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

Q: Sentence: 'a small dog sits in the rear window of a car'. Find frequency of the letter 'm'

A: 1
****
Q: Sentence: 'a variety of a different type of vegetables'. Find frequency of the letter 't'

A: 4
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Q: Sentence: 'a zebra and large bird are standing together near a fence'. Find frequency of the letter 'a'

A:
8
****