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 tower with some bright lights and clocks on it'. Find frequency of the letter 'h'

Answer: 3

Question: Sentence: 'a red stop sign with street signs above it'. Find frequency of the letter 't'

Answer: 5

Question: Sentence: 'couple of people just exited the bus and is walking through parking lot'. Find frequency of the letter 'w'

Answer:
1