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 couple of men sitting next to each other under an umbrella'. Find frequency of the letter 'n'

Answer: 5


Question: Sentence: 'a man serving himself pizza in a wooden booth'. Find frequency of the letter 'n'

Answer: 4


Question: Sentence: 'two men in a restaurant smiling while one of them is trying to tie their tie'. Find frequency of the letter 'n'

Answer:
6


