diff --git a/zxcvbn/scoring.py b/zxcvbn/scoring.py
index 8903f53..1e608dc 100644
--- a/zxcvbn/scoring.py
+++ b/zxcvbn/scoring.py
@@ -131,7 +131,7 @@ def round_to_x_digits(number, digits):
 #
 # assumes:
 # * passwords are stored as salted hashes, different random salt per user.
-#   (making rainbow attacks infeasable.)
+#   (making rainbow attacks infeasible.)
 # * hashes and salts were stolen. attacker is guessing passwords at max rate.
 # * attacker has several CPUs at their disposal.
 # ------------------------------------------------------------------------------
diff --git a/zxcvbn/scripts/build_frequency_lists.py b/zxcvbn/scripts/build_frequency_lists.py
index 60c61ab..94c27e1 100644
--- a/zxcvbn/scripts/build_frequency_lists.py
+++ b/zxcvbn/scripts/build_frequency_lists.py
@@ -14,7 +14,7 @@
 
 def get_ranked_english():
     '''
-    wikitionary has a list of ~40k English words, ranked by frequency of occurance in TV and movie transcripts.
+    wikitionary has a list of ~40k English words, ranked by frequency of occurrence in TV and movie transcripts.
     more details at:
     http://en.wiktionary.org/wiki/Wiktionary:Frequency_lists/TV/2006/explanation