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

Q: Sentence: 'two people under an umbrella while walking down a sidewalk'. Find frequency of the letter 'i'

A: 3
****
Q: Sentence: 'cooked fish and green broccoli share a single white plate'. Find frequency of the letter 'c'

A: 3
****
Q: Sentence: 'a train in the shape of a boat driving past a road filled with cars'. Find frequency of the letter 'o'

A:
3
****