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

[EX Q]: Sentence: 'a person is water skiing and there are birds flying around above them'. Find frequency of the letter 'n'
[EX A]: 5

[EX Q]: Sentence: 'some food on plates next to each other on a table'. Find frequency of the letter 'e'
[EX A]: 6

[EX Q]: Sentence: 'someone's toes that are not covered by a blanket'. Find frequency of the letter 't'
[EX A]:
5