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

Q: Sentence: 'a surfer is in the middle of an ocean wave'. Find frequency of the letter 'i'

A: 3
****
Q: Sentence: 'a burning wood stove has a tea pot sitting on top of it and is full of wood'. Find frequency of the letter 'a'

A: 5
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Q: Sentence: 'a cow standing in front of a old farm building'. Find frequency of the letter 'i'

A:
4
****