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 number of people holding umbrellas on a city street', Sentence2: 'people approach and order at a red food truck'. Is the frequency of the word 'a' in two sentences equal?
Example Output: No

Example Input: Sentence1: 'a dog sits on the sidewalk while a girl looks at her cellphone', Sentence2: 'a cat looks outside of a dirty old window'. Is the frequency of the word 'looks' in two sentences equal?
Example Output: Yes

Example Input: Sentence1: 'a cake being cut by people in the military', Sentence2: 'view of a historic brick building looking toward the sky'. Is the frequency of the word 'a' in two sentences equal?
Example Output:
Yes