regular

accepted accurate accustomed amicable average blank businesslike certain changeless characteristic commonest common conformable constant continual continuous conventional correct customary cyclical daily dull dull duller duller equable even faithfully formal frequenter general good gradational gradual habitual habitué horizontal innate instinctual instinctive intimate invariant invariable isochronous isochronal judicial just legitimate level mainstream measured methodic methodical/methodic methodical monochromatic more accurate more correct more certain more even more constant more formal more normal more orderly more prevalent most correct most punctual more methodical more methodical more methodic more methodic more readable more solid more natural more uniform most certain most methodical most methodical most methodic most methodic natural neat neatest neater normal old-school old school orderly pandemic paradigmatic periodic plane planar prevalent prevailing prototypical prototypal prototypic punctual readable recurrent round-the-clock routine run-of-the-mill sequential set shapely sincerest sincere smooth smoother smoothest sociable solid standing stated steady steady steady-going step-by-step stock stocker stuporous symmetric symmetrical systematical systematic through time-honored truer truest trig traditional true unbroken typic typical uniform universal unremitting unwavering usual veridical virtuous wonted