TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a blue fire hydrant painted on the bottom of it'. Find frequency of the letter 'h'

SOLUTION: 2

PROBLEM: Sentence: 'a blue tripocal bird is perched on a wooden fence'. Find frequency of the letter 'd'

SOLUTION: 3

PROBLEM: Sentence: 'one man grabbing another at a table while laughing'. Find frequency of the letter 'n'

SOLUTION:
5