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 boy in a high chair eating a cupcake'. Find frequency of the letter 'i'

Answer: 4


Question: Sentence: 'a crowd of fans watch soccer players from stadium seating'. Find frequency of the letter 'f'

Answer: 3


Question: Sentence: 'a baseball player swinging a bat during a game'. Find frequency of the letter 'u'

Answer:
1