how many years did rabbi meir kahane study in yeshiva and in kolel?
I know what your asking exactly, but the truth is all his life really, because its not just studying and then "closing the books". He studied, practiced, studied, practiced and taught (in person and in books). Really you can say he is still teaching- every time someone opens his books, or listens to his shiurim, Od Kahane Chai. Chai Chai Yekayam.