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

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

[EX Q]: Sentence: 'a girl that has a kite in the air'. Find frequency of the letter 'r'
[EX A]: 2

[EX Q]: Sentence: 'the horses are grazing on the grass by the water'. Find frequency of the letter 'e'
[EX A]:
6