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

[EX Q]: Sentence: 'a dilapidated bench in a park under a tree'. Find frequency of the letter 'p'
[EX A]: 2

[EX Q]: Sentence: 'a man paddle boarding by a boat dock in a city'. Find frequency of the letter 'o'
[EX A]: 3

[EX Q]: Sentence: 'a black and yellow fire hydrant on a sidewalk'. Find frequency of the letter 'e'
[EX A]:
3