time frame
noun [ C ] (also timeframe, time-frame) uk/ˈtaɪm ˌfreɪm/ us/ˈtaɪm ˌfreɪm/
（安排进行某活动的）时间框架，时间范围
a period of days, weeks, months, etc. within which an activity is intended to happen
Have you set a time frame for completing the job? 你给这项工作定完成时限了吗？
The new law introduces these changes in/within a fairly long/short time frame. 新颁布的法律计划在相当长／短的时间内进行这些改革。