TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'party cakes in plastic containers, with a cake with a plastic santa claus and reindeer on top'. Find frequency of the letter 's'

SOLUTION: 6

PROBLEM: Sentence: 'a grapefruit, toast, coffee and other items are on a tray'. Find frequency of the letter 't'

SOLUTION: 6

PROBLEM: Sentence: 'a road with a car at the end of the road surrounded by trees'. Find frequency of the letter 'd'

SOLUTION:
5