TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a man in a suit makes the first slice into a cake'. Find frequency of the letter 't'

SOLUTION: 4

PROBLEM: Sentence: 'a plastic plastic plate topped with three different type of food'. Find frequency of the letter 'l'

SOLUTION: 3

PROBLEM: Sentence: 'a couple of kids on a bed with a laptop'. Find frequency of the letter 'l'

SOLUTION:
2