▪ brief , short
She ruled for ten years, except for a brief ~.
▪ long , wide
You are advised to leave a wide ~ before you have your next child.
▪ 10-minute , six month , three-year , etc.
Try setting your automatic email checker to 30-minute ~s.
▪ fixed , specified
the amount of oxygen used by the muscles during a specified ~
After a decent ~ she made her new relationship public.
They will be interviewed again after an appropriate time ~ has elapsed.
▪ at ~s
At ~s a bell rings and workers stop for a drink.
▪ in the ~
Polling day was a week away and Baldwin made two speeches in the ~.
▪ ~ between
The ~s between his various illnesses grew shorter and shorter.
▪ at fixed, periodic, regular, etc. ~s
Trains run at fixed ~s.
He returned home during the day at regular ~s.
▪ at irregular ~s , at random ~s
The accounts were updated at irregular ~s.
▪ at hourly, weekly, monthly, etc. ~s
Meetings are held at monthly ~s.