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

[Q]: Sentence: 'a person dressed all in black snowboarding down a slope'. Find frequency of the letter 'e'
[A]: 4


[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: 'a kitten is sitting on the floor next to a shoe'. Find frequency of the letter 'e'
[A]:
4