TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a half eaten doughnut in a persons hand'. Find frequency of the letter 'h'

SOLUTION: 3

PROBLEM: Sentence: 'one woman holding a video game controller and standing next to another woman'. Find frequency of the letter 't'

SOLUTION: 5

PROBLEM: Sentence: 'a woman sits on a parked motorcycle on the street'. Find frequency of the letter 'e'

SOLUTION:
5