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

Q: Sentence: 'a couple of people are sitting at a table'. Find frequency of the letter 'e'

A: 5
****
Q: Sentence: 'a small white dog looking out a car window'. Find frequency of the letter 'l'

A: 3
****
Q: Sentence: 'two women sit on a carriage drawn by a horse'. Find frequency of the letter 'a'

A:
5
****