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 man walking in front of a grand building', Sentence2: 'a white street sign sitting on the side of a driveway'. Is the frequency of the word 'a' in two sentences equal?
Example Output: Yes

Example Input: Sentence1: 'back view of a zebra walking through the grass', Sentence2: 'a blue and white boat with stuff in it on a beach'. Is the frequency of the word 'a' in two sentences equal?
Example Output: No

Example Input: Sentence1: 'a person that is doing a trick in the air', Sentence2: 'restored antique cars line up in a row at outdoor auto show'. Is the frequency of the word 'that' in two sentences equal?
Example Output:
No