Of the nature of a habit
ingrained, confirmed, frequent, periodic, continual, routine, mechanical, automatic, perfunctory, seasoned, iterated, permanent, perpetual, on-going, consuetudinary, consuetudinal, fixed, rooted, inveterate, systematic, recurrent, periodical, methodical, repeated, iterative, reiterative, disciplined, practiced, accustomed, established, set, repetitious, cyclic, reiterated, settled, trite, stereotyped, formal, addicted, acting by force of habit, being such by habit, in a groove, in a rut; see also chronic, constant 1, regular 3.
Subject to a disease or habit for a long time:chronic, confirmed, habituated, inveterate. See continue
Familiar through repetition:accustomed, chronic, routine. See usual
Commonly practiced or used:accustomed, customary, regular, usual, wonted. See usual