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

[EX Q]: Sentence: 'there is a person standing on a blue towel'. Find frequency of the letter 'n'
[EX A]: 4

[EX Q]: Sentence: 'a young girl skiing down a snowy mountain'. Find frequency of the letter 'l'
[EX A]: 1

[EX Q]: Sentence: 'people testing out cell phones in a store'. Find frequency of the letter 'u'
[EX A]:
1