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: 'an empty clean kitchen with island, marble countertops , stove and cabinetry'. Find frequency of the letter 'l'

Answer: 3

Question: Sentence: 'an image of a street sign with a corner restaurant'. Find frequency of the letter 'u'

Answer: 1

Question: Sentence: 'the traffic light has turned yellow; proceed with caution'. Find frequency of the letter 'y'

Answer:
1