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: 'hotel towels with sunglasses perched and hotel business cards and catalog'. Find frequency of the letter 'o'

SOLUTION: 4

PROBLEM: Sentence: 'a crowd of people on a street with a "stop" sign being held up'. Find frequency of the letter 'l'

SOLUTION:
2