On our old hybrid, I serviced the bearings every two years. Even with the EZ-lubes it's still a good idea to take the whole thing apart just to see what's going on. In between the servicings, I would give the hubs a couple of squirts of fresh grease just before long trips. The short trips, I left them alone. After 10 years, still the original bearings and not one drop of grease on the brakes.
Geoff & Jill
& Sierra, the little white monster
2013 Ford F-150 XTR SC Ecoboost
2015 Jayco Jay Flight 24FBS