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: 'there is a baseball game on and a few people are watching'. Find frequency of the letter 'i'

Answer: 2


Question: Sentence: 'a tv in a glass mirror in the bathroom'. Find frequency of the letter 'h'

Answer: 2


Question: Sentence: 'a blue airplane is flying during a clear day'. Find frequency of the letter 'l'

Answer:
4