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 closeup view of a bathroom sink, that is very modern'. Find frequency of the letter 'e'

Answer: 4

Question: Sentence: 'a train on a train track going through a bunch of trees'. Find frequency of the letter 'u'

Answer: 2

Question: Sentence: 'an adult teaching a child to play tennis on an asphalt court'. Find frequency of the letter 'y'

Answer:
1