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

Q: Sentence: 'a man sitting in front of a laptop computer next to a child'. Find frequency of the letter 'e'

A: 2
****
Q: Sentence: 'a toilet of some sort near a sink of some sort'. Find frequency of the letter 'o'

A: 7
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Q: Sentence: 'a fat brown and white cat drinking from a toilet'. Find frequency of the letter 'n'

A:
4
****