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 softball player holding the bat on first base'. Find frequency of the letter 't'

Answer: 4


Question: Sentence: 'a group of three dogs laying on a kitchen floor'. Find frequency of the letter 'r'

Answer: 3


Question: Sentence: 'the cutting board is covered with chopped carrots'. Find frequency of the letter 's'

Answer:
2