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

[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 tennis player that is running to get the tennis ball'. Find frequency of the letter 't'
[A]: 7


[Q]: Sentence: 'the man is wearing a messy black tie'. Find frequency of the letter 't'
[A]:
2