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: 'wooden and black bench on the side of the road'. Find frequency of the letter 'a'

Answer: 3

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 group of young women eating pizza together'. Find frequency of the letter 'r'

Answer:
2