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: 'eight donuts are cooked together in oil in a metal tray'. Find frequency of the letter 'h'
2

Sentence: 'there are two pictures of a stuffed bear wearing a sweater'. Find frequency of the letter 'w'

3