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: 'view of a historic brick building looking toward the sky', Sentence2: 'a train engine is traveling down some tracks'. Is the frequency of the word 'a' in two sentences equal?
Example Output: Yes

Example Input: Sentence1: 'an airplane that is either landing or just taking off', Sentence2: 'the zebra is standing behind a chain link fence'. Is the frequency of the word 'landing' in two sentences equal?
Example Output:
No