CONTINUOUSLY
all the time at
all times; continuously.Your blood keeps flowing all the time.That electric motor runs all the time.
(a)round the clock
continuously for twenty-four hours a day.The priceless jewels were guarded around the clock.Grandfather was so sick that he had to have nurses round the clock.
(a)round-the-clock
constant; day and night. (Adjective.)Grandfather required around-the-clock care.I tuned into the around-the-clock news station.
at all times
constantly; continuously.You must keep your passport handy at all times when you are traveling in a foreign country.When you're in a crowd, you must watch your child at all times.
at a stretch
continuously; without stopping.We all had to do eight hours of duty at a stretch.The baby doesn't sleep for more than three hours at a stretch.
with every (other) breath
[saying something] repeatedly or continually.Bob was out in the yard, raking leaves and cursing with every other breath.The child was so grateful that she was thanking me with every breath.