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 person on a skateboard going down a ramp'. Find frequency of the letter 'n'

Answer: 4


Question: Sentence: 'a man walking a large elephant down a dirt road'. Find frequency of the letter 'g'

Answer: 2


Question: Sentence: 'the train has stopped on the tracks'. Find frequency of the letter 'p'

Answer:
2