WordNet (r) 3.0 (2006):

routinely
    adv 1: according to routine or established practice; "he
           routinely parked in a no-parking zone"

Moby Thesaurus II by Grady Ward, 1.0:

59 Moby Thesaurus words for "routinely":
   again and again, all in all, all things considered, altogether,
   as a rule, as a whole, as an approximation, at large, broadly,
   broadly speaking, by and large, chiefly, chronically, commonly,
   dully, equably, evenly, frequently, generally, generally speaking,
   habitually, in a rut, in general, in many instances, inveterately,
   mainly, many a time, many times, monotonously, most often, mostly,
   normally, not infrequently, not seldom, oft, often, often enough,
   oftentimes, ofttimes, on balance, on the whole, ordinarily,
   overall, persistently, predominantly, prevailingly, recurringly,
   regularly, repeatedly, repetitively, roughly, roughly speaking,
   speaking generally, tediously, uniformly, unrelievedly, unseldom,
   usually, whenever you wish