scheduled maintenance
Primarily used in computing and engineering for planned, periodic maintenance of systems, equipment, or software.
Scheduled maintenance of the server is performed late every Sunday night.
A notice of scheduled maintenance arrived.
A broader term for maintenance in general, not necessarily scheduled or periodic. 定期保守 specifically implies a planned, recurring schedule.
General maintenance or upkeep. 定期保守 adds the nuance of being periodic and scheduled.
Compound of 定期 (periodic) and 保守 (maintenance). A straightforward Sino-Japanese technical term.