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 dog on a table while a dog groomer cuts its fur'. Find frequency of the letter 'r'

SOLUTION: 3

PROBLEM: Sentence: 'an empty clean kitchen with island, marble countertops , stove and cabinetry'. Find frequency of the letter 'l'

SOLUTION: 3

PROBLEM: Sentence: 'a person with some scissors over a bowl'. Find frequency of the letter 's'

SOLUTION:
6