TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'man is snow gear and skis skiing in the snow'. Find frequency of the letter 'i'

SOLUTION: 5

PROBLEM: Sentence: 'a truck is parked in front of a store'. Find frequency of the letter 't'

SOLUTION: 3

PROBLEM: Sentence: 'some highly cultural objects on display in this well lit room'. Find frequency of the letter 't'

SOLUTION:
4