python occurrences in list code example

Example 1: How to see how many times somting is in a list python

vowels = ['a', 'e', 'i', 'o', 'i', 'u']
count = vowels.count('i')

Example 2: count occurrences of value in array python

>>> l = ["a","b","b"]
>>> l.count("a")

Example 3: count values in list usiing counter

from collections import Counter