TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a herd of zebra standing on top of a grass covered field'. Find frequency of the letter 'e'

SOLUTION: 5

PROBLEM: Sentence: 'a man standing on a surf board in the ocean'. Find frequency of the letter 'f'

SOLUTION: 1

PROBLEM: Sentence: 'a close up of a zebra with plant life all around'. Find frequency of the letter 'o'

SOLUTION:
3