Update and rename count-occurences-of-a-value-in-array.md to count-occurrences-of-a-value-in-array.md

snippets/count-occurrences-of-a-value-in-array.md

@@ -1,7 +1,7 @@
-### Count occurences of a value in array
+### Count occurrences of a value in array
 
 Use `filter()` to create an array containing only the items with the specified value, count them using `length`.
 
 ```js
-var countOccurences = (arr, value) => arr.filter(v => v === value).length;
+var countOccurrences = (arr, value) => arr.filter(v => v === value).length;
 ```