TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'two elephants facing each other touching trunks in an enclosure'. Find frequency of the letter 'f'

SOLUTION: 1

PROBLEM: Sentence: 'a softball player holding the bat on first base'. Find frequency of the letter 't'

SOLUTION: 4

PROBLEM: Sentence: 'a shop sits next to several houses in a small town area'. Find frequency of the letter 'n'

SOLUTION:
3