diuturnitas

diūturnitās ātis, f

diuturnus, length of time, long duration, durability : diuturnitate exstingui: temporis: pacis, Cs.: memoriae.

diuturnitas
dĭūturnĭtas, ātis, f. [diuturnus], I length of time , long duration , durability (good prose). ...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.