Oddly enough, 2 and 8, while bad, are not the worst numbers to have ever had in Super Bowl history. But since there are only 55 combinations (assuming you don't care which team has which number, which you probably do), and there have only been 46 games with 184 quarters, the empirical data doesn't really tell us a lot, nor will it help us to predict the likelihood of a safety occurring. (And multiples are Right Out!) Meaningless information. Except, maybe, that 7-0, 0-0, and 3-0 are really good to have. No surprises there.