TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a tall building with antenna stands before a jet flying in the background'. Find frequency of the letter 't'

SOLUTION: 6

PROBLEM: Sentence: 'people plating cake in an office meeting room'. Find frequency of the letter 'g'

SOLUTION: 2

PROBLEM: Sentence: 'six down hill skiers posing together and smiling'. Find frequency of the letter 'i'

SOLUTION:
6