"More than one flat per year"?!?!

How about "More than one flat per month"? Or even week sometimes?

Goddess Mother, I used to commute on a road that led to several wrecking yards. As a result, there was/is more sharp junk on that road than you'd ever imagine. Tried *all* the "flat resistant" tires. Marathons seem to be the best, but even those can go flat - ask me how I know this...