This is the 5379th most frequent Chinese word.
任內
"During one's tenure."
任內 is used here to indicate the duration during which a person holds an office or position.
他在任內成功地推行了一系列改革。
During his tenure, he successfully implemented a series of reforms.
任內 signifies the period during which the chairman exercised authority over the company.
在董事長的任內,公司業績顯著提升。
During the chairman's tenure, the company's performance improved significantly.
Here, 任內 describes the period of time when a particular person held a specific responsibility or role.