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

[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: 'two giraffes standing next to some trees'. Find frequency of the letter 'f'
[A]: 2


[Q]: Sentence: 'two images of a train on a track, one black and white, and one in color'. Find frequency of the letter 'n'
[A]:
7