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

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

Sentence: 'apples, pears, and oranges are piled up for sale'. Find frequency of the letter 'a'
6

Sentence: 'the skateboarder is putting on a show using the picnic table as his stage'. Find frequency of the letter 't'

7

