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

[EX Q]: Sentence: 'a white paper plate with a slice of pizza on it'. Find frequency of the letter 'h'
[EX A]: 2

[EX Q]: Sentence: 'a street scene looking at the back of the stop sign'. Find frequency of the letter 't'
[EX A]: 6

[EX Q]: Sentence: 'a kid eats a sandwich on a picnic bench'. Find frequency of the letter 'e'
[EX A]:
2