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 man flying through the air on top of a skateboard'. Find frequency of the letter 'r'

Answer: 3


Question: Sentence: 'a group of people standing around a table filled with assorted electronic devices'. Find frequency of the letter 'w'

Answer: 1


Question: Sentence: 'some police officers on horses in the road'. Find frequency of the letter 'h'

Answer:
2