TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'two bigger elephants standing with a small elephant'. Find frequency of the letter 't'

SOLUTION: 5

PROBLEM: Sentence: 'a woman throwing a frisbee on a field'. Find frequency of the letter 's'

SOLUTION: 1

PROBLEM: Sentence: 'a woman hitting a tennis ball on the tennis court'. Find frequency of the letter 't'

SOLUTION:
6