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 flying through the air on a bicycle'. Find frequency of the letter 'u'

Answer: 1


Question: Sentence: 'a castle like bed room that has the era of templar knight similarities'. Find frequency of the letter 'm'

Answer: 3


Question: Sentence: 'girl with a cowboy hat and a band around her hands'. Find frequency of the letter 'd'

Answer:
4