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

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

[Q]: Sentence: 'a herd of horses standing next to each other on a field'. Find frequency of the letter 'r'
[A]: 3

[Q]: Sentence: 'a baby boy sitting in front of a large berry covered cake'. Find frequency of the letter 'c'
[A]:
2