定期计划 meaning in English

periodic plan
term plan

If you need to change the service startup account , make sure you do so during regularly scheduled maintenance or when the databases can be taken offline without interrupting daily operations
如果需要更改服务启动帐户，则必须确保在定期计划维护期间或数据库离线时执行此操作，以确保不中断日常操作。
Should the government decide to go ahead with the issue of bonds , either on an ad hoc basis or in the form of a regular programme similar to that of the exchange fund , this could be arranged with minimal lead time
假若政府决定发债，无论是临时性质抑或类似外汇基金票据及债券的定期计划，有关安排都可以很快完成。