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

Q: Sentence: 'a group of cows that are standing in the grass'. Find frequency of the letter 'g'

A: 3
****
Q: Sentence: 'a dog sitting in the back of a truck flat bed'. Find frequency of the letter 'h'

A: 1
****
Q: Sentence: 'a large dog sitting next to a boy near a bench'. Find frequency of the letter 'g'

A:
3
****
