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 snowboarder making a jump of a snowy ledge'. Find frequency of the letter 'o'
[EX A]: 4

[EX Q]: Sentence: 'a couple of beds and a desk in a room'. Find frequency of the letter 'e'
[EX A]:
3