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 man hits a tennis ball with a racket on the court'. Find frequency of the letter 'c'

Answer: 2


Question: Sentence: 'a small white plane sitting on top of the ocean'. Find frequency of the letter 'e'

Answer: 4


Question: Sentence: 'three blue utility sinks and two white regular sinks'. Find frequency of the letter 'e'

Answer:
5