TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a man standing in front of a statue near a metal pole'. Find frequency of the letter 'f'

SOLUTION: 2

PROBLEM: Sentence: 'a man paddle boarding by a boat dock in a city'. Find frequency of the letter 'o'

SOLUTION: 3

PROBLEM: Sentence: 'a bed with a dog laying on it next to two laptop computers'. Find frequency of the letter 'n'

SOLUTION:
3