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: 'one man grabbing another at a table while laughing'. Find frequency of the letter 'n'

Answer: 5


Question: Sentence: 'a pizza is in a box on a table outside'. Find frequency of the letter 'u'

Answer: 1


Question: Sentence: 'a train traveling on a bridge over water'. Find frequency of the letter 'r'

Answer:
5