TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a plastic tray that has different foods inside of it'. Find frequency of the letter 't'

SOLUTION: 6

PROBLEM: Sentence: 'a stop sign next to houses with christmas lights'. Find frequency of the letter 's'

SOLUTION: 7

PROBLEM: Sentence: 'a girl in a zebra print hoodie drinking a cup of water as others have a discussion at the dining table'. Find frequency of the letter 'i'

SOLUTION:
10