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 zebra standing alone chewing on a tree branch', Sentence2: 'a number of people holding umbrellas on a city street'. Is the frequency of the word 'branch' in two sentences equal?
Example Output: No

Example Input: Sentence1: 'a large train is traveling down the tracks', Sentence2: 'cars are driving down the road in this city'. Is the frequency of the word 'down' in two sentences equal?
Example Output: Yes

Example Input: Sentence1: 'a man wearing glasses sitting in a chair while a cat lays behind him', Sentence2: 'a man holding up an umbrella near other umbrellas'. Is the frequency of the word 'an' in two sentences equal?
Example Output:
No