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 young man with glasses on is taking a big bite'. Find frequency of the letter 's'

Answer: 4


Question: Sentence: 'two people holding their skies in a snowy resort'. Find frequency of the letter 'n'

Answer: 3


Question: Sentence: 'people are waiting to cross a street in an old town'. Find frequency of the letter 'e'

Answer:
5