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

Answer: 1


Question: Sentence: 'soccer players on opposite teams fight for control over a ball'. Find frequency of the letter 't'

Answer: 4


Question: Sentence: 'an instruction sign is displayed on a city street'. Find frequency of the letter 't'

Answer:
5