In this task, you need to count the number of times the given letter appears in the given sentence.
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Question: Sentence: 'a desk covered in notepads, a laptop and other devices'. Find frequency of the letter 'c'

Answer: 2

Question: Sentence: 'a street scene looking at the back of the stop sign'. Find frequency of the letter 't'

Answer: 6

Question: Sentence: 'skiers race in line down a snowy path'. Find frequency of the letter 'i'

Answer:
3