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

Sentence: 'a batter, catcher and umpire waiting for the pitch and a major league baseball game'. Find frequency of the letter 'c'
3

Sentence: 'older man getting ready to swing his bat at a ball on a stand in front of a group of viewers'. Find frequency of the letter 'n'
7

Sentence: 'a table with a basket of fruit and a vase with flowers in it'. Find frequency of the letter 'e'

4