TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a log in the water with three birds perched on it'. Find frequency of the letter 'r'

SOLUTION: 4

PROBLEM: Sentence: 'decorated baseball cake in a clear plastic box'. Find frequency of the letter 'k'

SOLUTION: 1

PROBLEM: Sentence: 'luggage filled with a animal that was murdered for it's fur'. Find frequency of the letter 'n'

SOLUTION:
1