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: 'this is an image of a woman playing tennis'. Find frequency of the letter 'f'
[EX A]: 1

[EX Q]: Sentence: 'a man playing ping pong on an outdoor table'. Find frequency of the letter 'g'
[EX A]:
3