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

Q: Sentence: 'a cat that is standing next to an open suitcase'. Find frequency of the letter 'e'

A: 3
****
Q: Sentence: 'a bus is stopped in front of a graphic statue'. Find frequency of the letter 'e'

A: 2
****
Q: Sentence: 'two cat laying on the bed near each other'. Find frequency of the letter 'r'

A:
2
****