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

Q: Sentence: 'there is a woman pointing at something with her dog'. Find frequency of the letter 'i'

A: 5
****
Q: Sentence: 'a player swings his bat at a baseball game'. Find frequency of the letter 'p'

A: 1
****
Q: Sentence: 'an old rusty fire hydrant is seen in this picture'. Find frequency of the letter 'e'

A:
4
****