isContainedIn.md: rewrite descrpition

snippets/isContainedIn.md

@@ -6,7 +6,7 @@ tags: array,intermediate
 Returns `true` if the elements of the first array are contained in the second one regardless of order, `false` otherwise.
 
 Use a `for...of` loop over a `Set` created from the first array.
-Use `Array.prototype.some()` to check if all distinct values are contained in the second array, use `Array.prototype.filter()` to compare the amount of occurences of each distinct value in both arrays.
+Use `Array.prototype.some()` to check if all distinct values are contained in the second array, use `Array.prototype.filter()` to compare the number of occurrences of each distinct value in both arrays.
 Return `false` if the count of any element is greater in the first array than the second one, `true` otherwise.
 
 ```js