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

[Q]: Sentence: 'an elephant has taken a man's hat in its trunk'. Find frequency of the letter 'p'
[A]: 1

[Q]: Sentence: 'a small boat travels on the water next to the shore'. Find frequency of the letter 'a'
[A]: 5

[Q]: Sentence: 'three people standing at the waters edge on a beach with a blue surfboard'. Find frequency of the letter 'd'
[A]:
3