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: 'the large modern train is on the train track'. Find frequency of the letter 'm'

Answer: 1


Question: Sentence: 'a picture of two men on a motorcycle in front of a railroad track'. Find frequency of the letter 'n'

Answer: 4


Question: Sentence: 'some oranges and a banana and some vegetables'. Find frequency of the letter 's'

Answer:
4