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 on stiltz is standing under a pink umbrella'. Find frequency of the letter 's'

SOLUTION: 3

PROBLEM: Sentence: 'a stuffed animal sitting on an empty bed'. Find frequency of the letter 'u'

SOLUTION: 1

PROBLEM: Sentence: 'a person that is looking out his window'. Find frequency of the letter 'n'

SOLUTION:
3