This is the 7134th most frequent Swedish word.
rochester
The word "Rochester" is not a Swedish word; it is typically a proper noun referring to a place name in English-speaking contexts.
Here, 'Rochester' functions as a proper noun identifying a specific place.
Rochester är en stad i delstaten New York.
Rochester is a city in the state of New York.
In this sentence, 'Rochester' again acts as a proper noun referring to the city, used in a question.
Har du varit i Rochester någon gång?
Have you ever been to Rochester?
'Rochester' is used as a subject in this sentence, referring to the city and tied to its historical context.