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

[Q]: Sentence: 'a group of people seated in chairs together and facing the same direction, with one man holding a soccer ball in his hands'. Find frequency of the letter 'm'
[A]: 2

[Q]: Sentence: 'a bunch of fruit sitting in a bowl, its overflowing'. Find frequency of the letter 't'
[A]: 4

[Q]: Sentence: 'an large office desk with multiple computers, books and paper'. Find frequency of the letter 'c'
[A]:
2