Well Tito just plain sucks and never fought that often to begin with. He fought 1-2 times a year before and after he became a UFC star. It's like that with all the old school UFC fighters though like Tito, Couture, Liddell, etc. They fought 2-3 times a year before they became stars and they're still fighting 2-3 times a year now even though they make 100 times more money. Fighters coming over from small shows or Pride are used to fighting 4-6 times a year and they're carrying that over into their UFC careers. Shit most of the newer UFC fighters have as much or even more fights than UFC veterans do.
Just wait and see. I have a strong feeling that up and coming fighters who are fighting frequently right now will still fight as much when they make it big. The time of fighters like Liddell fighting 2-3 times a year is almost over.