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 young girl is brushing her teeth in this dated photo'. Find frequency of the letter 't'

Answer: 5


Question: Sentence: 'a blue train on a track next to another track'. Find frequency of the letter 'c'

Answer: 2


Question: Sentence: 'a group of young people preparing to go skiing'. Find frequency of the letter 'k'

Answer:
1