TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'man is snow gear and skis skiing in the snow'. Find frequency of the letter 'i'

SOLUTION: 5

PROBLEM: Sentence: 'a black computer with a screen reading "press any key to begin."'. Find frequency of the letter 'a'

SOLUTION: 5

PROBLEM: Sentence: 'a male in a black and white shirt and a desk'. Find frequency of the letter 'a'

SOLUTION:
7