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: 'some people sitting on surfboards in the water'. Find frequency of the letter 't'

Answer: 4


Question: Sentence: 'a car accident has slowed traffic as a clean up crew works'. Find frequency of the letter 'f'

Answer: 2


Question: Sentence: 'a keychain with a little bear hanging from a key in the door'. Find frequency of the letter 'f'

Answer:
1