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: 'a glass vase sits between two statues'. Find frequency of the letter 'o'

SOLUTION: 1

PROBLEM: Sentence: 'a group of people on motor bikes on a road'. Find frequency of the letter 'g'

SOLUTION:
1