In this task, answer 'Yes' if the frequency of the given word in the two sentences is equal, else answer 'No'.

Example Input: Sentence1: 'a couple of men riding on the backs of horses', Sentence2: 'a chair and a couch in a room'. Is the frequency of the word 'backs' in two sentences equal?
Example Output: No

Example Input: Sentence1: 'a group of people walking down a street', Sentence2: 'a group of stuffed bears inside of a display'. Is the frequency of the word 'of' in two sentences equal?
Example Output: No

Example Input: Sentence1: 'a boy playing with the scooter and wear a set of protect hard', Sentence2: 'a blue and white boat with stuff in it on a beach'. Is the frequency of the word 'stuff' in two sentences equal?
Example Output:
No