TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'this marketplace has a lot of fresh fruit and vegetables'. Find frequency of the letter 'v'

SOLUTION: 1

PROBLEM: Sentence: 'a group of people seated in chairs together and facing the same direction, with one man holding a soccer ball in his hands'. Find frequency of the letter 'm'

SOLUTION: 2

PROBLEM: Sentence: 'a man sitting on a post on a sidewalk'. Find frequency of the letter 'l'

SOLUTION:
1