occupancy/occupant

occupancy /ˈɔkjupənsi/ n. ［u］占有，占用期；居住：The occupancy rate of beds has been averaging out about 80 percent.病床占用率平均保持在80％左右。He took uninterrupted occupancy of this position for ten years.他持续担任这一职位10年。

 occupant /ˈɔkjupənt/ n. [c] 占有者，居住者：the occupant of a house (position) 住在房子内的人（任某职务的人）The previous occupants had left the house in a terrible mess.前房客走后屋里凌乱不堪。The sole occupant of the car was an elderly man.这辆车只供一位上了年纪的人使用。