TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a group of three dogs laying on a kitchen floor'. Find frequency of the letter 'r'

SOLUTION: 3

PROBLEM: Sentence: 'a group of men standing around a table cutting a cake'. Find frequency of the letter 'g'

SOLUTION: 3

PROBLEM: Sentence: 'open living room with a couch and a television on the wall'. Find frequency of the letter 'e'

SOLUTION:
4