Collocations for interval - noun

brief, short
She ruled for ten years, except for a brief interval.

long, wide
You are advised to leave a wide interval before you have your next child.

decent

at ~s
At intervals a bell rings and workers stop for a drink.

~ between
The intervals between his various illnesses grew shorter and shorter.

at fixed/frequent/periodic/regular intervals
Trains run at fixed intervals. | He returned home during the day at regular intervals.

at hourly/weekly/fortnightly/monthly, etc. intervals
Meetings are held at monthly intervals.