TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a young elephant is touching a bigger elephant with its trunk'. Find frequency of the letter 'i'

SOLUTION: 5

PROBLEM: Sentence: 'three people are gathered around sitting on a park bench'. Find frequency of the letter 'g'

SOLUTION: 2

PROBLEM: Sentence: 'the picture is fuzzy and it is hard to see if the skateboarder will fall'. Find frequency of the letter 't'

SOLUTION:
6