seasonal change
Quarterly
An event that occurs every three months is known as a quarterly event. In a calendar year, there are four quarters, each lasting three months. Examples of quarterly events include financial reporting periods, earnings releases, and business reviews. These events are important for tracking progress and making strategic decisions throughout the year.
Quarterly
Quarterly.
Something that occurs TWICE a month is called SEMI monthly (semi=half) and something that occurs every TWO months is called BI-Monthly (BI=TWO)
Every three months
Every three months is called a quarter. And there are four quarters in a year.
To be on the safe side, you should change your email password every three months. Some email programs are more secure than others. Most of them suggest changing it every three months on average.
An event that occurs once every three years.
Change oil every three months
a quarter of a year
Every three months