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

[Q]: Sentence: 'a few men walking through a market place'. Find frequency of the letter 'f'
[A]: 1


[Q]: Sentence: 'a double decker transit bus parks by a blue on the side of the street in front of a brick building in the city'. Find frequency of the letter 't'
[A]: 9


[Q]: Sentence: 'there is a small tent that has a table and two chairs in it'. Find frequency of the letter 'l'
[A]:
3