TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a bus with two floors belonging to london country'. Find frequency of the letter 't'

SOLUTION: 4

PROBLEM: Sentence: 'a man riding a white surfboard on a large wave'. Find frequency of the letter 'a'

SOLUTION: 7

PROBLEM: Sentence: 'a table with a plate of food and some eye glasses'. Find frequency of the letter 'l'

SOLUTION:
3