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: 'surfboard being displayed in stor window with clothes behind it'. Find frequency of the letter 't'
[A]: 4


[Q]: Sentence: 'five people, all dressed in costumes, wearing skis on a mountain'. Find frequency of the letter 'i'
[A]:
5