TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'two computers and a laptop set up on a desk'. Find frequency of the letter 'r'

SOLUTION: 1

PROBLEM: Sentence: 'a black bear sitting in the grass taking a rest'. Find frequency of the letter 'a'

SOLUTION: 6

PROBLEM: Sentence: 'two boys that are each holding a pink toothbrush'. Find frequency of the letter 'd'

SOLUTION:
1