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

[Q]: Sentence: 'hotel towels with sunglasses perched and hotel business cards and catalog'. Find frequency of the letter 'o'
[A]: 4


[Q]: Sentence: 'a black horse with a white dot on its forehead'. Find frequency of the letter 't'
[A]: 4


[Q]: Sentence: 'the sun goes down over a bike tied to a bench at the beach'. Find frequency of the letter 't'
[A]:
5