Bicentennial or bicentennially
Once every century?
A century means one hundred consecutive years, and adjective form is centennial. The adverb form centennially is rarely used.
Biannual~ this means twice in one yearbiennial~ this means once every two years
It means once in every two years.
hi uhh bientum???
Bicentennial
Bientum. Coming for the Latin word "Centum" meaning one hundred.
Relating to, or consisting of, a hundred., Occurring once in every hundred years; centennial., The aggregate of a hundred single things; specifically, a century., A commemoration or celebration of an event which occurred a hundred years before.
Biennial or biannual can refer to something which happens every two years.
Something that happens every six years is sexennial.
'M'... there is one 'M' in 'minute', two in 'moment' and no 'm's' in hundred years.
The Secular Games were held once every hundred years in ancient Greece.