TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'man sitting on the side of a van playing the guitar'. Find frequency of the letter 'm'

SOLUTION: 1

PROBLEM: Sentence: 'a giraffe sticking it's tongue out near a window'. Find frequency of the letter 'a'

SOLUTION: 4

PROBLEM: Sentence: 'a bathroom with a toilet and a bath tub'. Find frequency of the letter 't'

SOLUTION:
6