Biannual refers to an event occurring twice a year. It is synonymous with semiannual and should not be confused with biennial, which means occurring every two years.
Biennial events or occurrences are those that happen every two years, a frequency and timing different from bianual events which happen twice within a single year.
Frequency refers to the number of times an event or occurrence happens within a specified period, applicable in various contexts such as advertising, communications, and general activities.
The term 'Hertz' has dual meanings in different contexts. The scientific term 'Hertz' refers to the unit of frequency, while 'Hertz' (capitalized) is also known as the largest U.S. automobile rental agency.
