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 person on a skateboard going down a ramp'. Find frequency of the letter 'n'

Answer: 4


Question: Sentence: 'pedestrians pass by a stop sign, some holding surfboards'. Find frequency of the letter 'n'

Answer: 3


Question: Sentence: 'two people going after a frisbee in a game'. Find frequency of the letter 'e'

Answer:
6