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: 'some cubbies with towels in a blue bathroom'. Find frequency of the letter 'l'
[A]: 2


[Q]: Sentence: 'a boy is laying in a bed holding on to his teddy bear'. Find frequency of the letter 'd'
[A]:
4