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 doll with huge eyes and black hair with blunt bangs holds a red umbrella'. Find frequency of the letter 'e'

Answer: 5


Question: Sentence: 'several zebras  and a giraffe in an enclosure'. Find frequency of the letter 's'

Answer: 3


Question: Sentence: 'a woman sitting on a bus bare foot and drinking a bottled water'. Find frequency of the letter 'b'

Answer:
3