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

[Q]: Sentence: 'a large grass pasture land with sheep grazing on grass'. Find frequency of the letter 'a'
[A]: 7


[Q]: Sentence: 'a plastic tray that has different foods inside of it'. Find frequency of the letter 't'
[A]: 6


[Q]: Sentence: 'three men standing beside each other looking at a book'. Find frequency of the letter 'e'
[A]:
7