TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a bunch of fruit sitting in a bowl, its overflowing'. Find frequency of the letter 't'

SOLUTION: 4

PROBLEM: Sentence: 'a young man with glasses on is taking a big bite'. Find frequency of the letter 's'

SOLUTION: 4

PROBLEM: Sentence: 'a walking trail with multiple signs posted in ground'. Find frequency of the letter 'l'

SOLUTION:
4