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: 'an elephant with broken tusks stands in front of a hill and boulders'. Find frequency of the letter 'n'

Answer: 7


Question: Sentence: 'a passenger train that is going over a bridge'. Find frequency of the letter 't'

Answer: 3


Question: Sentence: 'a controller set near some action figurines on a table'. Find frequency of the letter 'n'

Answer:
5