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 man holding a brown paper bag kite'. Find frequency of the letter 'b'

Answer: 2


Question: Sentence: 'a man on a skateboard going down a ramp while people are watching'. Find frequency of the letter 'w'

Answer: 3


Question: Sentence: 'a green army truck parked in seclusion by the american flag'. Find frequency of the letter 'a'

Answer:
6