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: 'a red building with a crowd of people outside it near the water'. Find frequency of the letter 'e'

A: 7
****
Q: Sentence: 'a squirrel is eating while standing on a wooden post'. Find frequency of the letter 's'

A:
4
****