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

Sentence: 'a photo of a small boat on a shore'. Find frequency of the letter 'f'
1

Sentence: 'a person holding a wine glass in one hand and bread sticks in the other'. Find frequency of the letter 'd'
4

Sentence: 'a woman sitting at a desk in front of three kids'. Find frequency of the letter 'h'
1