In this task, you need to count the number of times the given letter appears in the given sentence.

Input: Consider Input: Sentence: 'two people holding their skies in a snowy resort'. Find frequency of the letter 'n'

Output: 3


Input: Consider Input: Sentence: 'a baseball player dropping his bat and starting to run'. Find frequency of the letter 'o'

Output: 2


Input: Consider Input: Sentence: 'an analog clock attached to a brick building'. Find frequency of the letter 'a'


Output: 6