TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a person is performing a stunt on a snowboard'. Find frequency of the letter 'p'

SOLUTION: 2

PROBLEM: Sentence: 'a parking meter painted green with a sign that describes it as not a parking meter'. Find frequency of the letter 's'

SOLUTION: 4

PROBLEM: Sentence: 'a tray filled with lots of cupcakes covered in chocolate icing'. Find frequency of the letter 'i'

SOLUTION:
5