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: 'man in red shirt with black suitcase standing outside of building'. Find frequency of the letter 'i'

Answer: 8


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

Answer: 2


Question: Sentence: 'the fire department has trucks outside of a store, and men on the roof'. Find frequency of the letter 'e'

Answer:
8