TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a couple of men standing inside of a liquor store'. Find frequency of the letter 'p'

SOLUTION: 1

PROBLEM: Sentence: 'a man with a large grey and black beard and glasses and a tie'. Find frequency of the letter 'e'

SOLUTION: 5

PROBLEM: Sentence: 'a man in a blue shirt is holding a camera'. Find frequency of the letter 'a'

SOLUTION:
6