An event that occurs every thirty years is called a "triennial" event. However, this term can be misleading since "triennial" technically refers to something happening every three years. For events specifically occurring every thirty years, the term "tricenary" can be used, although it is less common.
Walled gardens were included in almost every Roman house, no matter how poor. These gardens were used to feed the families. They were also ornamental.
As 1948 is a leap year, its day and date combination do not repeat very often. It only happens every 28 years. Taking just the 20th and 21st centuries, these are the years that are the same as 1948: 1920, 1948, 1976, 2004, 2032, 2060 and 2088.
Seems that maids were plentiful. One for every duty in the kitchen. Dairy, pastry making, cook assistant. runner, washer up, usualyl called skullery made.
A common obstacle that every civilization must face is hurricanes,storms,etc.
Dress
Every 100 years is called a century, made up of 10 decades.
An event occurring every two years is referred to as a biennial event. This pattern indicates that the event happens once every two years.
It is a triennial event. A triennial event happens three times a year.
Change.
A triennial event happens every three years.
Annual event
If something happens twice a month it is called biweekly because it happens every other week and a month has 4 weeks. there is also bimonthly which is every other month but not really a direct word for something that happens twice a month.
Something that happens every six years is sexennial.
yes i'm positive it happens every year
bidecadal
nothing
I think you are asking about a census.