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 dog laying on the back of a boat in the water'. Find frequency of the letter 't'

Answer: 4


Question: Sentence: 'a player swings his bat at a baseball game'. Find frequency of the letter 'p'

Answer: 1


Question: Sentence: 'skiers race in line down a snowy path'. Find frequency of the letter 'i'

Answer:
3