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

Q: Sentence: 'a man swinging a bat while playing baseball'. Find frequency of the letter 'm'

A: 1
****
Q: Sentence: 'an airplane is being towed away from the jet bridge'. Find frequency of the letter 's'

A: 1
****
Q: Sentence: 'the surfer is staying ahead of a long wave'. Find frequency of the letter 's'

A:
3
****