TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'three people are gathered around sitting on a park bench'. Find frequency of the letter 'g'

SOLUTION: 2

PROBLEM: Sentence: 'men are riding on motorcycles with a man riding in their carriers'. Find frequency of the letter 'r'

SOLUTION: 8

PROBLEM: Sentence: 'a traffic light sitting on the side of a road'. Find frequency of the letter 'l'

SOLUTION:
1