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

[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 person holding a wine glass in one hand and bread sticks in the other'. Find frequency of the letter 'd'
[EX A]: 4

[EX Q]: Sentence: 'two different slices of pizza in a pizza box'. Find frequency of the letter 'i'
[EX A]:
5