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

[EX Q]: Sentence: 'a grapefruit, toast, coffee and other items are on a tray'. Find frequency of the letter 't'
[EX A]: 6

[EX Q]: Sentence: 'a woman is looking at sheep off in a field'. Find frequency of the letter 'm'
[EX A]: 1

[EX Q]: Sentence: 'a cow is standing in side of a pen in a building'. Find frequency of the letter 'i'
[EX A]:
7