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

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

[Q]: Sentence: 'soccer players on opposite teams fight for control over a ball'. Find frequency of the letter 't'
[A]: 4

[Q]: Sentence: 'a couple of elephants are standing in the water'. Find frequency of the letter 'p'
[A]:
2