Quinquennial = something that happens every 5 years. Lustral = also something that happens every 5 years
or we could invent:
semi-Decennial: where semi is half and Deccennial happens every 10 years.
Biennial means [occuring every two years].
the presidential election
semiannual
The letter E appears twice in the word "week" and only once in the word "year."
The letter "e"
.
The letter 'E'
e
Biannual describes something that occurs twice a year, once every half year.
An event occurs 2 times in a year
A biannual event is something that occurs twice a year.
Biannual
Annually.
Biannual
biannual...
The very simple definition of semiannual refers to something that occurs only twice a year or every six months. Semi refers to two or twice and annual refers to a year.
Something that is annual occurs once every year. It does not refer to something that occurs continually throughout a year. Something that lasts or continues for a long or apparently indefinite time would be called perennial.
Something that is annual occurs once every year. It does not refer to something that occurs continually throughout a year. Something that lasts or continues for a long or apparently indefinite time would be called perennial.
biannual...
Biannual