TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'a small boy in a high chair eating a cupcake'. Find frequency of the letter 'i'

SOLUTION: 4

PROBLEM: Sentence: 'a woman fully dressed as a geisha'. Find frequency of the letter 'm'

SOLUTION: 1

PROBLEM: Sentence: 'stop sign and a fasten seatbelts sign at the side of a road'. Find frequency of the letter 'g'

SOLUTION:
2