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 river with a long dragon boat in it and rowers on the boat in sets of two, along with two other people'. Find frequency of the letter 'h'

Answer: 4


Question: Sentence: 'a blue tripocal bird is perched on a wooden fence'. Find frequency of the letter 'd'

Answer: 3


Question: Sentence: 'a boy jumping up to catch a frisbee'. Find frequency of the letter 't'

Answer:
2