TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'the skateboarder has on red and black sneakers and is riding a skateboard'. Find frequency of the letter 'g'

SOLUTION: 1

PROBLEM: Sentence: 'a man flying through the air on a bicycle'. Find frequency of the letter 'u'

SOLUTION: 1

PROBLEM: Sentence: 'a little pizza sitting on a plate'. Find frequency of the letter 'p'

SOLUTION:
2