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

Input: Consider Input: Sentence: 'two little girls playing with a bat and a tennis ball'. Find frequency of the letter 'w'

Output: 2


Input: Consider Input: Sentence: 'bananas are being dried in a tropical setting'. Find frequency of the letter 'i'

Output: 5


Input: Consider Input: Sentence: 'two people apparently dancing or otherwise interacting with a video game'. Find frequency of the letter 'c'


Output: 2