incumbency

名词 incumbency:

1. the term during which some position is held
   同义词：tenure, term of office
2. a duty that is incumbent upon you
3. the office of an incumbent

in.cum.ben.cy

n.（名词）
【复数】 in.cum.ben.cies
The quality or condition of being incumbent.
有义务：负有义务的性质或状况
Something incumbent; an obligation.
义务：负有义务的东西；义务

The holding of an office or ecclesiastical benefice.
担任职务：担任某个职务或任圣职
The term of an office or a benefice.
任职或圣职期间