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: 'city two way street with cars lined up on both sides'. Find frequency of the letter 'h'

Answer: 2

Question: Sentence: 'an old glass vase containing flowers on a glass table'. Find frequency of the letter 'b'

Answer: 1

Question: Sentence: 'a group of snowboarders posing with their snowboards'. Find frequency of the letter 'w'

Answer:
3