cotenure
/kəʊˈtɛnjər/Definitions
1. noun
A period of time during which two or more tenures or periods of office are shared or held jointly.
“The cotenure of the two CEOs led to a more stable leadership team.”
2. noun
A period of time during which two or more offices, professorships, etc., are shared by two or more persons.
“The cotenure of the two professors made their academic research more productive.”