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

[Q]: Sentence: 'two zebra stand near the wooden posts on a building'. Find frequency of the letter 't'
[A]: 4


[Q]: Sentence: 'statues of 2 zebras and 1 giraffe in a doorway'. Find frequency of the letter 'a'
[A]: 6


[Q]: Sentence: 'a bird is standing upright in the water and leaves'. Find frequency of the letter 'e'
[A]:
4