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

Q: Sentence: 'a toilet sits in a cluttered bathroom next to a sink'. Find frequency of the letter 'a'

A: 4
****
Q: Sentence: 'there is a woman pointing at something with her dog'. Find frequency of the letter 'i'

A: 5
****
Q: Sentence: 'a group of people on a tennis court'. Find frequency of the letter 'e'

A:
3
****