What do we call regular software enhancements that are released every three months?

The term "Quarterly Updates" refers to software enhancements that occur four times a year, typically every three months. This approach allows organizations to regularly receive improvements, bug fixes, and new features, keeping their systems up to date with the latest capabilities and security enhancements.

Quarterly updates are common in many software development cycles because they provide a structured timeline for users and IT teams to plan for the changes and adapt to any new functionalities or fixes that may be included. By releasing updates quarterly, software vendors can maintain a consistent rhythm, enabling users to benefit from enhancements without overwhelming them with changes too frequently.

The other options describe different frequencies of updates but do not accurately represent the timeframe specified in the question. Monthly updates would occur more frequently than quarterly, while biannual updates would only happen twice a year, and annual upgrades imply a much longer timeframe for applying major changes to software. Hence, "Quarterly Updates" is the correct term for software enhancements released every three months.