TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a gray colored pigeon that is perched on a railing outside of a building, with other buildings in the background'. Find frequency of the letter 'e'

SOLUTION: 7

PROBLEM: Sentence: 'a person does a trick on a ramp on a snowboard'. Find frequency of the letter 's'

SOLUTION: 3

PROBLEM: Sentence: 'a person sitting outdoors with a frisbee in front of their face'. Find frequency of the letter 'e'

SOLUTION:
5