The Bulgarian method is not increasing the frequency of your training. Actually, that's only the point of the article.. most people would be completely crushed after only a handful if not fewer days training with near maximal weights several times a day. The article just provides one way to work up to such an intense schedule.
Most people should not attempt true bulgarian style training, it leaves you run down in all regards and injury prone..
Do some more digging into the method if you want to know more about it (you're way off base at the moment, the method is basically ridiculously high intensity, 100% of the time, at very low volume, very very (very..) high frequency), but it's not practical for almost everyone.