TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a young woman dressed in green and black operating a remote control'. Find frequency of the letter 'r'

SOLUTION: 5

PROBLEM: Sentence: 'a crowd of people skiing and enjoying the snow'. Find frequency of the letter 'o'

SOLUTION: 5

PROBLEM: Sentence: 'a tagged cow with a bell around its neck'. Find frequency of the letter 'o'

SOLUTION:
2