The premiership of a leader of a government is the period of time during which they are the leader.
例句
...the final years of Margaret Thatcher's premiership...玛格丽特·撒切尔首相任期的最后几年So far, his premiership has been dominated by crisis-management.到目前为止，他在其首相任期内主要是在应对危机。
N-SING
（英格兰）足球超级联赛
In England, the Premiership is the league in which the best football teams play.
例句
...their position at the bottom of the Premiership.他们在英超比赛中垫底