From Longman Dictionary of Contemporary Englishincumbencyin‧cum‧ben‧cy /ɪnˈkʌmbənsi/ noun (plural incumbencies) [countable usually singular, uncountable] formal PGOBECthe state of holding an official position, especially in politics, or the time when someone holds an official position
Examples from the Corpus
incumbency• Bryan said gubernatorial incumbency can be both an advantage and liability when running for the Senate.• In his present incumbency he takes a company into its twelfth season this spring looking remarkably solid and healthy.• Frankly, this is where the power of the incumbency is strong.• This attitude is long-standing and transcends party lines, having more to do with incumbency than partisanship. 