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

Answer: 4


Question: Sentence: 'group of cars on the road with the sun setting behind it'. Find frequency of the letter 'd'

Answer: 2


Question: Sentence: 'a few cows grazing in an open field'. Find frequency of the letter 'd'

Answer:
1