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

[Q]: Sentence: 'a man that is on his cell phone'. Find frequency of the letter 's'
[A]: 2


[Q]: Sentence: 'a tall building with antenna stands before a jet flying in the background'. Find frequency of the letter 't'
[A]: 6


[Q]: Sentence: 'a young man in black wearing a white tie'. Find frequency of the letter 'i'
[A]:
4