You should give your brake pads, rotors, (entire brake system) a very detailed look, and inspection ever 15,000 miles or year.
As for when they were replaced. I never replaced myn aslong as I had them. I machined my rotors once. But that is all. I have no idea when the last time they were replaced on my car. They are not squeaking or giving me any reason that they are going. (knock on wood)
PS: you spelled brakes 'breaks' hehe i fixed it for ya, "perks of being a mod' hahah.