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 batter, catcher and umpire waiting for the pitch and a major league baseball game'. Find frequency of the letter 'c'
[A]: 3


[Q]: Sentence: 'there is one slice of pizza left on the pan'. Find frequency of the letter 'e'
[A]:
6