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: 'two people holding their skies in a snowy resort'. Find frequency of the letter 'n'

Answer: 3

Question: Sentence: 'a gray colored pigeon that is perched on a railing outside of a building, with other buildings in the background'. Find frequency of the letter 'e'

Answer: 7

Question: Sentence: 'closeup of a person in purple tie and white shirt'. Find frequency of the letter 'r'

Answer:
3