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

[Q]: Sentence: 'two women standing next to each other holding tennis rackets'. Find frequency of the letter 't'
[A]: 7


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


[Q]: Sentence: 'a group of people riding bikes down a street'. Find frequency of the letter 'e'
[A]:
5