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

[EX Q]: Sentence: 'a man standing on a tennis court holding a racquet'. Find frequency of the letter 's'
[EX A]: 2

[EX Q]: Sentence: 'a couple of men sitting next to each other under an umbrella'. Find frequency of the letter 'n'
[EX A]: 5

[EX Q]: Sentence: 'a laptop and bowl of food sits on top of the food'. Find frequency of the letter 'p'
[EX A]:
3