TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a large group of motorcycles parked along a street'. Find frequency of the letter 'a'

SOLUTION: 5

PROBLEM: Sentence: 'a pizza pie sitting on a wooden table with tongs'. Find frequency of the letter 't'

SOLUTION: 5

PROBLEM: Sentence: 'a barbecue grill with an assortment of meats and mushrooms on it'. Find frequency of the letter 'e'

SOLUTION:
4