TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'group of snowboarders on a snowy trail overlooking a mountain'. Find frequency of the letter 'r'

SOLUTION: 5

PROBLEM: Sentence: 'this is an image of a woman playing tennis'. Find frequency of the letter 'f'

SOLUTION: 1

PROBLEM: Sentence: 'a clean and tidy kitchen with modern decor'. Find frequency of the letter 'a'

SOLUTION:
3