TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'different sets of luggage in a baggage claim area'. Find frequency of the letter 'r'

SOLUTION: 2

PROBLEM: Sentence: 'a dog laying on the back of a boat in the water'. Find frequency of the letter 't'

SOLUTION: 4

PROBLEM: Sentence: 'drinks fridge and glassware in a small cafe'. Find frequency of the letter 'a'

SOLUTION:
6