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

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


[Q]: Sentence: 'a ready to eat pizza on a rack'. Find frequency of the letter 'r'
[A]: 2


[Q]: Sentence: 'a bed on the side of a city street'. Find frequency of the letter 'h'
[A]:
1