TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'there is a woman pointing at something with her dog'. Find frequency of the letter 'i'

SOLUTION: 5

PROBLEM: Sentence: 'three birds are sitting on a tree in a forest'. Find frequency of the letter 'h'

SOLUTION: 1

PROBLEM: Sentence: 'a hand holding a device and some people and counters'. Find frequency of the letter 'e'

SOLUTION:
6