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

[EX Q]: Sentence: 'two indian women in colorful garb standing barefoot with two indian men'. Find frequency of the letter 'd'
[EX A]: 3

[EX Q]: Sentence: 'young boy flying kite in large field at outdoor event'. Find frequency of the letter 'y'
[EX A]: 3

[EX Q]: Sentence: 'a magazine with a couple of cat around a toilet on it's cover'. Find frequency of the letter 'a'
[EX A]:
7