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: 'four men standing around two pizzas in a conference room'. Find frequency of the letter 't'

Answer: 2

Question: Sentence: 'a stop sign next to houses with christmas lights'. Find frequency of the letter 's'

Answer: 7

Question: Sentence: 'a large white airplane next to some people'. Find frequency of the letter 'a'

Answer:
4