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 couple of people that are on a baseball field'. Find frequency of the letter 'c'

Answer: 1

Question: Sentence: 'a construction sign is displayed on a street'. Find frequency of the letter 'i'

Answer: 4

Question: Sentence: 'in daylight hours, a dog looks outside through a window'. Find frequency of the letter 'h'

Answer:
4