TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a social occasion of people are uncovered before the open day'. Find frequency of the letter 'c'

SOLUTION: 4

PROBLEM: Sentence: 'a large cooked pizza on a dining table'. Find frequency of the letter 'n'

SOLUTION: 3

PROBLEM: Sentence: 'a man laying in bed with his dog laying on top of him'. Find frequency of the letter 'e'

SOLUTION:
1