TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a glass vase sits between two statues'. Find frequency of the letter 'o'

SOLUTION: 1

PROBLEM: Sentence: 'a crowd of people standing in front of a green train'. Find frequency of the letter 'g'

SOLUTION: 2

PROBLEM: Sentence: 'a street sign warning of humps on the side of a street'. Find frequency of the letter 'i'

SOLUTION:
3