TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a boy catching a frisbee while standing ins bunch of leaves'. Find frequency of the letter 'a'

SOLUTION: 5

PROBLEM: Sentence: 'an airplane is being towed away from the jet bridge'. Find frequency of the letter 's'

SOLUTION: 1

PROBLEM: Sentence: 'a man water skiing on a overcast day'. Find frequency of the letter 'm'

SOLUTION:
1