durations, cycles, time, quarters, intervals, spurts, lulls, hypopnea, days, holocene epoch, januaries, intermissions, phases, respites, eras, tenures, stretches, onsets, fortnights, wartimes, during, nights, months, timespan, span, interregnum, photoperiod, amounts, shifts, menses, trimesters, maturities, weekends, hours, diapause, carryback, epochs, term, interglacial, periodicities, chukkers, workdays, inactivity, deferral, fluctuations, winters, hiatuses, twelve, droughts, summers, holidays, levels, amenorrhea, streaks, listlessness, stoppages, luteal phase, occasions, accrual, halves, rotations, interludes, nrem sleep, cessations, bursts, oligocene epoch, absences, patterns, dysmenorrhoea, situations, hypnotics, flexitime, net, dispensations, layovers, troughs, semesters, sittings, elapses, spells, versus, status epilepticus, segments, twilights, lifetimes, menstruation, dormancy, catnaps, cyclicity, regimes, lability, spikes, diastole, amenorrhoea, distances, hypersomnia, funded debt, estrous cycle, eternities, categories, postnasal drip, solstices, period, seasons, times, chapters, episodes, paragraphs, stints, sessions, sojourns, stages, subperiods, tours

., adjusting entry, anabiosis, anestrum, anestrus, annuity in advance, anoestrum, anoestrus, bandwagon effect, binge-purge syndrome, binge-vomit syndrome, breather, bulimarexia, bulima nervosa, catatonia, catatonic schizophrenia, catatonic type schizophrenia, cheyne-stokes respiration, chukka, chukker, coreopsis, deep-freeze, deepfreeze, deep freezer, diestrum, diestrus, era, freezer, gc, geological era, geological period, ghz, gigacycle, gigacycle per second, gigahertz, half, irritable bowel syndrome, kc, khz, kilocycle, kilocycle per second, kilohertz, mc, mdma, megacycle, megacycle per second, megahertz, mhz, mucous colitis, ordinary annuity, period, periodic apnea of the newborn, periodic breathing, pluckily, price control, quarter, rainy, regency, remittent, schnorchel, schnorkel, season, showery, snorkel, snorkel breather, spastic colon, split shift, squalling, squally, terahertz, thz, tick-weed, tickseed, tickweed, time of year, time unit, trimester, unit of time, unsupervised, verdigris, work, workhouse