Synonyms for Incumbency:

n.

business, occupancy, background, appointment, division of labor, calling, collaboration, delegation, call, place, occupation, career. incumbency (noun)
tenure, term of office.
tenure (noun)
occupancy, occupation.
time (noun)
tenure, term of office.

Other synonyms:

occupancy. occupation. Other relevant words:
appointment, occupation, place, occupancy.

Usage examples for incumbency

  1. I left the room for a moment- I had taken him into the kitchen where, during the incumbency of the regular cook I hardly dare venture myself, and he made himself comfortable quite near the range. – The Siege of the Seven Suitors by Meredith Nicholson