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

[EX Q]: Sentence: 'this is a close up view of a tennis player during the game'. Find frequency of the letter 't'
[EX A]: 3

[EX Q]: Sentence: 'a woman sitting in front of a giant slice of cheese pizza'. Find frequency of the letter 'e'
[EX A]: 4

[EX Q]: Sentence: 'a person wearing blue shoes riding a skateboard'. Find frequency of the letter 's'
[EX A]:
4