In this task, you need to count the number of times the given letter appears in the given sentence.

Q: Sentence: 'city two way street with cars lined up on both sides'. Find frequency of the letter 'h'

A: 2
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Q: Sentence: 'a pizza pie sitting on a wooden table with tongs'. Find frequency of the letter 't'

A: 5
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Q: Sentence: 'a dog is walking by a building in black and white'. Find frequency of the letter 'd'

A:
3
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