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: 'there is a woman pointing at something with her dog'. Find frequency of the letter 'i'

SOLUTION: 5

PROBLEM: Sentence: 'a dog sitting in a kennel on a bed with its mouth opened'. Find frequency of the letter 't'

SOLUTION:
5