"It varies, but usually roughly a month. Sometimes there will be smaller, one day event arenas between them with a smaller pool of tributes. No less deadly, but at least they lack the ongoing survival aspects of the main ones. No worrying about finding food or water." From the sound of it, Albert prefers those to the drawn out ones. He does, but mostly because the arenas themselves are more likely to kill you than to run you into other tributes. The less he has to kill personally, the better.