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

Sentence: 'group of cars on the road with the sun setting behind it'. Find frequency of the letter 'd'
2

Sentence: 'a person on a sidewalk jumping with an umbrella'. Find frequency of the letter 'a'
5

Sentence: 'this marketplace has a lot of fresh fruit and vegetables'. Find frequency of the letter 'v'

1