TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a couple of people that are on a baseball field'. Find frequency of the letter 'c'

SOLUTION: 1

PROBLEM: Sentence: 'a little boy that has a toothbrush in his mouth'. Find frequency of the letter 'r'

SOLUTION: 1

PROBLEM: Sentence: 'the large living room of an old house painted bright red'. Find frequency of the letter 'r'

SOLUTION:
4