TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a white toilet sitting next to a bathroom sink'. Find frequency of the letter 'b'

SOLUTION: 1

PROBLEM: Sentence: 'hotel towels with sunglasses perched and hotel business cards and catalog'. Find frequency of the letter 'o'

SOLUTION: 4

PROBLEM: Sentence: 'a skate boarder waiting his turn to go'. Find frequency of the letter 'd'

SOLUTION:
1