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

Answer: 2


Question: Sentence: 'hand holding a white calculator inside a store'. Find frequency of the letter 'o'

Answer: 3


Question: Sentence: 'a sigh welcoming the public to the area and a river sign'. Find frequency of the letter 'i'

Answer:
5