TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a person holding onto a pink kite at the beach'. Find frequency of the letter 'n'

SOLUTION: 4

PROBLEM: Sentence: 'a couple of men sitting next to each other under an umbrella'. Find frequency of the letter 'n'

SOLUTION: 5

PROBLEM: Sentence: 'an iron sculpture of a grizzly bear seated on a bench'. Find frequency of the letter 'b'

SOLUTION:
2