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

Q: Sentence: 'a railroad train pulling up to the train platform'. Find frequency of the letter 'o'

A: 3
****
Q: Sentence: 'a bowl of granola with raspberries and honey on top with a spoon'. Find frequency of the letter 'w'

A: 3
****
Q: Sentence: 'person driving a skinny boat through some water'. Find frequency of the letter 'r'

A:
4
****