TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a softball player holding the bat on first base'. Find frequency of the letter 't'

SOLUTION: 4

PROBLEM: Sentence: 'a white and blue plate topped with meat and a salad'. Find frequency of the letter 'u'

SOLUTION: 1

PROBLEM: Sentence: 'a person siting on a bench under a tree wit ha backpack'. Find frequency of the letter 'c'

SOLUTION:
3