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

[Q]: Sentence: 'a baby elephant walks beside an adult elephant along a post and cable'. Find frequency of the letter 'l'
[A]: 6


[Q]: Sentence: 'several zebras  and a giraffe in an enclosure'. Find frequency of the letter 's'
[A]: 3


[Q]: Sentence: 'a white plate sitting on top of a plate filled with food'. Find frequency of the letter 'e'
[A]:
4


