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 small boat travels on the water next to the shore'. Find frequency of the letter 'a'

Answer: 5

Question: Sentence: 'different sets of luggage in a baggage claim area'. Find frequency of the letter 'r'

Answer: 2

Question: Sentence: 'plastic fruit bins containing oranges, tangerines, and apples'. Find frequency of the letter 'a'

Answer:
6