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

Sentence: 'a boy swinging a bat while playing baseball'. Find frequency of the letter 'h'
1

Sentence: 'a man in his car eating a donut'. Find frequency of the letter 'm'
1

Sentence: 'a male doll has a striped shirt on with a tie along with a pair of jeans'. Find frequency of the letter 't'

5