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: 'a picture of a toilet and toilet paper in a bathroom'. Find frequency of the letter 'o'

Answer: 5

Question: Sentence: 'small kitchen area with sink full of dirty dishes'. Find frequency of the letter 'l'

Answer:
4