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

[EX Q]: Sentence: 'a jet that is flying in the sky with a banner behind it'. Find frequency of the letter 'r'
[EX A]: 1

[EX Q]: Sentence: 'a gray elephant is in a grassy field'. Find frequency of the letter 'e'
[EX A]: 3

[EX Q]: Sentence: 'a half eaten piece of food on a plate'. Find frequency of the letter 'a'
[EX A]:
5