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 cat sleeping near lots of pairs of shoes'. Find frequency of the letter 'r'

Answer: 2


Question: Sentence: 'a man hitting a tennis ball with a tennis racquet'. Find frequency of the letter 't'

Answer: 6


Question: Sentence: 'closeup of a person in purple tie and white shirt'. Find frequency of the letter 'r'

Answer:
3