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 social occasion of people are uncovered before the open day'. Find frequency of the letter 'c'

Answer: 4

Question: Sentence: 'a railroad train pulling up to the train platform'. Find frequency of the letter 'o'

Answer: 3

Question: Sentence: 'a black and silver motorcycle parked in the road'. Find frequency of the letter 'l'

Answer:
3