periodically Antonyms

on a daily basis day by day day after day most of the time at every turn at a stretch at all times as a whole night and day 24-7 as a rule every day every once in a while every so often at all hours of the day and night at one stretch on the odd occasion as a general rule hardly ever twenty-four seven on and on morning, noon and night in fits and starts from day to day habitually by fits and starts now and then incessantly generally frequently forever ever continuously continually constantly consistently biennially occasionally often oftentimes from time to time at times at large day in and day out all the time again and again invariably regularly perpetually permanently