TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a photo of a small boat on a shore'. Find frequency of the letter 'f'

SOLUTION: 1

PROBLEM: Sentence: 'a variety of a different type of vegetables'. Find frequency of the letter 't'

SOLUTION: 4

PROBLEM: Sentence: 'a jet flying upside down by a mountain'. Find frequency of the letter 'a'

SOLUTION:
3