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

[EX Q]: Sentence: 'a big bear walks through some grass'. Find frequency of the letter 'a'
[EX A]: 4

[EX Q]: Sentence: 'a person riding a camel in front of a truck'. Find frequency of the letter 't'
[EX A]: 2

[EX Q]: Sentence: 'a plane prepares to land on an airport runway'. Find frequency of the letter 'y'
[EX A]:
1