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

Sentence: 'a man hits a tennis ball with a racket on the court'. Find frequency of the letter 'c'
2

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

Sentence: 'a close up of fruit made of stitched cotton'. Find frequency of the letter 't'

5