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

[EX Q]: Sentence: 'a large motorcycle that has a man dressed in old clothing next to it'. Find frequency of the letter 'a'
[EX A]: 6

[EX Q]: Sentence: 'a gray colored pigeon that is perched on a railing outside of a building, with other buildings in the background'. Find frequency of the letter 'e'
[EX A]: 7

[EX Q]: Sentence: 'a group of men walking away from a propeller plane'. Find frequency of the letter 'e'
[EX A]:
4