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

[Q]: Sentence: 'a tall building with antenna stands before a jet flying in the background'. Find frequency of the letter 't'
[A]: 6


[Q]: Sentence: 'a person standing operating a cell phone in a room'. Find frequency of the letter 'n'
[A]: 6


[Q]: Sentence: 'a crisp clean white bathroom includes a large mirror and a walnut cabinet'. Find frequency of the letter 'c'
[A]:
4