diff --git a/locust/runners.py b/locust/runners.py
index 2a0e077415..a6e9542e13 100644
--- a/locust/runners.py
+++ b/locust/runners.py
@@ -97,18 +97,18 @@ def spawn_locusts(self, spawn_count=None, stop_timeout=None, wait=False):
             self.num_clients += spawn_count
 
         logger.info("Hatching and swarming %i clients at the rate %g clients/s..." % (spawn_count, self.hatch_rate))
-        occurence_count = dict([(l.__name__, 0) for l in self.locust_classes])
+        occurrence_count = dict([(l.__name__, 0) for l in self.locust_classes])
         
         def hatch():
             sleep_time = 1.0 / self.hatch_rate
             while True:
                 if not bucket:
-                    logger.info("All locusts hatched: %s" % ", ".join(["%s: %d" % (name, count) for name, count in six.iteritems(occurence_count)]))
+                    logger.info("All locusts hatched: %s" % ", ".join(["%s: %d" % (name, count) for name, count in six.iteritems(occurrence_count)]))
                     events.hatch_complete.fire(user_count=self.num_clients)
                     return
 
                 locust = bucket.pop(random.randint(0, len(bucket)-1))
-                occurence_count[locust.__name__] += 1
+                occurrence_count[locust.__name__] += 1
                 def start_locust(_):
                     try:
                         locust().run(runner=self)
diff --git a/locust/static/style.css b/locust/static/style.css
index 1eb566212a..d51f417419 100644
--- a/locust/static/style.css
+++ b/locust/static/style.css
@@ -329,7 +329,7 @@ a:hover {
     text-align: left;
 }
 
-#exceptions th.exception_occurences {
+#exceptions th.exception_occurrences {
     width: 110px;
     text-align: center;
 }
@@ -337,7 +337,7 @@ a:hover {
     text-align: left;
 }
 
-#exceptions td.occurences {
+#exceptions td.occurrences {
     text-align: center;
 }
 #exceptions td.traceback {
diff --git a/locust/stats.py b/locust/stats.py
index 7ec6a9b736..2041e4f62d 100644
--- a/locust/stats.py
+++ b/locust/stats.py
@@ -103,7 +103,7 @@ def log_error(self, method, name, error):
         if not entry:
             entry = StatsError(method, name, error)
             self.errors[key] = entry
-        entry.occured()
+        entry.occurred()
     
     def get(self, name, method):
         """
@@ -485,11 +485,11 @@ def _cache_response_times(self, t):
 
 
 class StatsError(object):
-    def __init__(self, method, name, error, occurences=0):
+    def __init__(self, method, name, error, occurrences=0):
         self.method = method
         self.name = name
         self.error = error
-        self.occurences = occurences
+        self.occurrences = occurrences
 
     @classmethod
     def parse_error(cls, error):
@@ -510,8 +510,8 @@ def create_key(cls, method, name, error):
         key = "%s.%s.%r" % (method, name, StatsError.parse_error(error))
         return hashlib.md5(key.encode('utf-8')).hexdigest()
 
-    def occured(self):
-        self.occurences += 1
+    def occurred(self):
+        self.occurrences += 1
 
     def to_name(self):
         return "%s %s: %r" % (self.method, 
@@ -522,7 +522,7 @@ def to_dict(self):
             "method": self.method,
             "name": self.name,
             "error": StatsError.parse_error(self.error),
-            "occurences": self.occurences
+            "occurrences": self.occurrences
         }
 
     @classmethod
@@ -531,7 +531,7 @@ def from_dict(cls, data):
             data["method"], 
             data["name"], 
             data["error"], 
-            data["occurences"]
+            data["occurrences"]
         )
 
 
@@ -580,7 +580,7 @@ def on_slave_report(client_id, data):
         if error_key not in global_stats.errors:
             global_stats.errors[error_key] = StatsError.from_dict(error)
         else:
-            global_stats.errors[error_key].occurences += error["occurences"]
+            global_stats.errors[error_key].occurrences += error["occurrences"]
     
     # save the old last_request_timestamp, to see if we should store a new copy
     # of the response times in the response times cache
@@ -647,7 +647,7 @@ def print_error_report():
     console_logger.info(" %-18s %-100s" % ("# occurrences", "Error"))
     console_logger.info("-" * (80 + STATS_NAME_WIDTH))
     for error in six.itervalues(global_stats.errors):
-        console_logger.info(" %-18i %-100s" % (error.occurences, error.to_name()))
+        console_logger.info(" %-18i %-100s" % (error.occurrences, error.to_name()))
     console_logger.info("-" * (80 + STATS_NAME_WIDTH))
     console_logger.info("")
 
@@ -745,7 +745,7 @@ def failures_csv():
             '"Method"',
             '"Name"',
             '"Error"',
-            '"Occurences"',
+            '"Occurrences"',
         ))
     ]
 
@@ -754,6 +754,6 @@ def failures_csv():
             s.method,
             s.name,
             s.error,
-            s.occurences,
+            s.occurrences,
         ))
-    return "\n".join(rows)
\ No newline at end of file
+    return "\n".join(rows)
diff --git a/locust/templates/index.html b/locust/templates/index.html
index 9623eec794..362ec16f56 100644
--- a/locust/templates/index.html
+++ b/locust/templates/index.html
@@ -137,7 +137,7 @@ <h2>Change the locust count</h2>
                 <div style="display:none;">
                     <table id="exceptions" class="stats">
                         <thead>
-                            <th class="exception_occurences stats_label" data-sortkey="1"># occurences</th>
+                            <th class="exception_occurrences stats_label" data-sortkey="1"># occurrences</th>
                             <th class="exception_traceback stats_label" data-sortkey="0">Traceback</th>
                         </thead>
                         <tbody>
@@ -235,7 +235,7 @@ <h2>Version <a href="https://github.com/locustio/locust/releases/tag/{{version}}
     <script type="text/x-jqote-template" id="errors-template">
         <![CDATA[
         <tr class="<%=(alternate ? "dark" : "")%>">
-            <td><%= this.occurences %></td>
+            <td><%= this.occurrences %></td>
             <td><%= this.method %></td>
             <td><%= this.name %></td>
             <td><%= function(e) { return e.replace("<", "&lt;"); }(this.error) %></td>
@@ -246,7 +246,7 @@ <h2>Version <a href="https://github.com/locustio/locust/releases/tag/{{version}}
     <script type="text/x-jqote-template" id="exceptions-template">
         <![CDATA[
         <tr class="<%=(alternate ? "dark" : "")%>">
-            <td class="occurences"><%= this.count %></td>
+            <td class="occurrences"><%= this.count %></td>
             <td class="traceback" title="Occured on: <%= this.nodes %>"><%= function(e) { return e.replace("<", "&lt;"); }(this.traceback) %>
 <%= function(e) { return e.replace("<", "&lt;"); }(this.msg) %></td>
         </tr>
diff --git a/locust/test/test_stats.py b/locust/test/test_stats.py
index fcfee1cc3a..e37774e2ac 100644
--- a/locust/test/test_stats.py
+++ b/locust/test/test_stats.py
@@ -136,7 +136,7 @@ def test_error_grouping(self):
         self.stats.log_error("GET", "/some-path", Exception("Exception!"))
             
         self.assertEqual(1, len(self.stats.errors))
-        self.assertEqual(2, list(self.stats.errors.values())[0].occurences)
+        self.assertEqual(2, list(self.stats.errors.values())[0].occurrences)
         
         self.stats.log_error("GET", "/some-path", Exception("Another exception!"))
         self.stats.log_error("GET", "/some-path", Exception("Another exception!"))