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 man opening up a package sitting on a couch'. Find frequency of the letter 'n'

Answer: 5

Question: Sentence: 'two indian women in colorful garb standing barefoot with two indian men'. Find frequency of the letter 'd'

Answer: 3

Question: Sentence: 'a woman in a messy kitchen with a child'. Find frequency of the letter 'a'

Answer:
4