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: 'guy leans on truck's hood while taking pics next to parked motorcycles'. Find frequency of the letter 's'

Answer: 4

Question: Sentence: 'a man holding a frisbee high into the air'. Find frequency of the letter 'a'

Answer: 4

Question: Sentence: 'a young woman with her arms around two young professional men'. Find frequency of the letter 'm'

Answer:
3