This is the 7293rd most frequent Russian word.
выборга
It seems there might be a typo in your query, as "выборга" is not a standard Russian word. If you meant "Выборг," it refers to Vyborg, a town in Russia.
Here, 'Выборг' (Vyborg) is a proper noun referring to the name of a town.
Выборг — это исторический город на северо-западе России.
Vyborg is a historic town in northwest Russia.
In this sentence, 'Выборге' is the locative case of the proper noun 'Выборг', indicating the place.
На полке я увидел книгу о строительстве крепостей в Выборге.
On the shelf, I saw a book about the construction of fortresses in Vyborg.
'Выборга' here is used as a properly inflected form of a potential surname, matching its grammatical context.