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: 'older man getting ready to swing his bat at a ball on a stand in front of a group of viewers'. Find frequency of the letter 'n'

Answer: 7


Question: Sentence: 'a tennis player after hitting a shot back to the other side of the court'. Find frequency of the letter 'n'

Answer: 3


Question: Sentence: 'a cat sitting on a laptop keyboard on a desk'. Find frequency of the letter 'n'

Answer:
3