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

[Q]: Sentence: 'a man in a suit makes the first slice into a cake'. Find frequency of the letter 't'
[A]: 4


[Q]: Sentence: 'black and white photograph of man and woman sitting on a bench'. Find frequency of the letter 'w'
[A]: 2


[Q]: Sentence: 'a man wearing a catchers mitt standing on a baseball field'. Find frequency of the letter 'a'
[A]:
9