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

[Q]: Sentence: 'a bus is stopped in front of a graphic statue'. Find frequency of the letter 'e'
[A]: 2


[Q]: Sentence: 'a black cat laying down on a bed'. Find frequency of the letter 'y'
[A]: 1


[Q]: Sentence: 'a large apple sits next to a small orange'. Find frequency of the letter 'm'
[A]:
1