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

[Q]: Sentence: 'a very big nice looking living room with nice furnishings'. Find frequency of the letter 'e'
[A]: 3


[Q]: Sentence: 'three men are in a kitchen cooking and cutting through a dish'. Find frequency of the letter 'a'
[A]: 4


[Q]: Sentence: 'the man is thinking while he works at his table'. Find frequency of the letter 'h'
[A]:
5