TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'an old glass vase containing flowers on a glass table'. Find frequency of the letter 'b'

SOLUTION: 1

PROBLEM: Sentence: 'a piece of bread stuffed with meat and vegetables'. Find frequency of the letter 's'

SOLUTION: 2

PROBLEM: Sentence: 'two green street signs sitting on top of another sign'. Find frequency of the letter 'g'

SOLUTION:
4