TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a gourmet looking hamburger with fries on a dining table with some wine'. Find frequency of the letter 't'

SOLUTION: 4

PROBLEM: Sentence: 'a picture of two men on a motorcycle in front of a railroad track'. Find frequency of the letter 'n'

SOLUTION: 4

PROBLEM: Sentence: 'a vase full of roses is sitting on a table'. Find frequency of the letter 'n'

SOLUTION:
2