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 snow filled mountain with a guy with ski's'. Find frequency of the letter 'f'

Answer: 1


Question: Sentence: 'a little boy that has a toothbrush in his mouth'. Find frequency of the letter 'r'

Answer: 1


Question: Sentence: 'a cow with a tag in its ear looking at the camera'. Find frequency of the letter 'w'

Answer:
2