TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a plastic tray that has different foods inside of it'. Find frequency of the letter 't'

SOLUTION: 6

PROBLEM: Sentence: 'a man is water skiing on a river'. Find frequency of the letter 'r'

SOLUTION: 3

PROBLEM: Sentence: 'a couple of cats stand on top of a car'. Find frequency of the letter 'a'

SOLUTION:
5