Things have changed to a degree because of the extra titles. Fifty years ago a long-time champion could beat a challenger only for that challenger to work his way back into contention and fight for the title again. Nowadays rematches only happen if there is a big demand for it, it has nothing to do with being champion.
i know robinson and lamotta happened six, but im tryin to get an idea of wat the odds that will happen again are in the near future, but im talkin after those two's last fight
have two fighters ever fought more than 3 times
check the HOF. you'll find out that many fighters have fought each other more than 3 times.
example: harry wills and sam langford fought 22 times.
azumah nelson and jesse james leija fought four times.