TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a little boy standing near a couch and a table'. Find frequency of the letter 'i'

SOLUTION: 2

PROBLEM: Sentence: 'a boy catching a frisbee while standing ins bunch of leaves'. Find frequency of the letter 'a'

SOLUTION: 5

PROBLEM: Sentence: 'a bathroom with a sink, toilet, tub and shower head'. Find frequency of the letter 'r'

SOLUTION:
2