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

Sentence: 'oranges are sitting in a bowl on a table'. Find frequency of the letter 'a'
5

Sentence: 'a guy riding a bike close to a car in the street'. Find frequency of the letter 'i'
4

Sentence: 'a closeup view of a bathroom sink, that is very modern'. Find frequency of the letter 'e'

4