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

[Q]: Sentence: 'a couple of items that are on the wall'. Find frequency of the letter 'm'
[A]: 1


[Q]: Sentence: 'a person is riding in a cart pulled by a horse'. Find frequency of the letter 'a'
[A]: 4


[Q]: Sentence: 'a little boy is hanging onto a tree in a park'. Find frequency of the letter 'n'
[A]:
4