TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'two zebra stand near the wooden posts on a building'. Find frequency of the letter 't'

SOLUTION: 4

PROBLEM: Sentence: 'a woman throwing a frisbee on a field'. Find frequency of the letter 's'

SOLUTION: 1

PROBLEM: Sentence: 'a video camera sitting in front of a counter'. Find frequency of the letter 'o'

SOLUTION:
4