TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a herd of giraffe walking across a field'. Find frequency of the letter 'k'

SOLUTION: 1

PROBLEM: Sentence: 'a jet that is flying in the sky with a banner behind it'. Find frequency of the letter 'r'

SOLUTION: 1

PROBLEM: Sentence: 'boats are traveling down the river in the middle of the city'. Find frequency of the letter 'b'

SOLUTION:
1