Pre-, then add name of event.
An annual event
A triennial event happens every three years.
An event or occurrence.
Something that happens often is referred to as "frequent." This term indicates that an event or occurrence takes place repeatedly within a given time frame. Other synonyms include "common" or "regular," depending on the context in which it is used.
I think you are asking about a census.
weekly
Horses will tend to lie down, and will refuse to get up. If this happens, immediatly call a vet. Before giving a horse something your not sure your horse can have, please contact your local Vet.
I think you are asking about a census.
Annual.
Déjà vu is the term used to describe the feeling of having experienced something before, even though it is happening for the first time. It is a phenomenon where an individual feels a sense of familiarity with a current situation or event.
triannual
When you foresee something and it happens, some people call it dejávu, others may call it prophecy. Depends on your forté