regularly, frequently, occasionally, routinely, continuously, continually, constantly, sporadically, intermittently, infrequently, repeatedly, once, biannually, sometimes, often, incessantly, semiannually, biweekly, dutifully, ceaselessly, then, yearly, alternately, rarely, automatically, endlessly, habitually, invariably, nightly, usually, compulsively, systematically, bimonthly, daily, obsessively, promptly, randomly, vigilantly, perpetually, manually, seldom, spasmodically, semiweekly, relentlessly, carefully, unceasingly, briefly, subsequently, weekly, repetitively, awhile, progressively, rigorously, accordingly, ad infinitum, frenetically, again, properly, simultaneously, typically, gradually, oftentimes, unbidden, also, extensively, generally, ad nauseam, diligently, monthly, biennially, exhaustively, faithfully, intermittingly, gently, laboriously, irregularly, semimonthly, elsewhere, incrementally, episodically, erratically, recurrently, haphazardly, separately, thoroughly, instantaneously, vigorously, slowly, torrentially, silently, obligingly, customarily, minutely, normally, unhurriedly, hither, involuntarily, noiselessly, discreetly, surreptitiously, lovingly, ritually

., accrued, accumulated, cork oak, cycle, cyclic neutropenia, depreciation charge, estimated tax, issue, macula, migrate, molter, moulter, national debt ceiling, number, oscillation, phoenix, pulsation, punctuate, quercus suber, strand, sunspot

sporadically