The terms concept drift and (to a lesser extent) context drift have been used in AI for decades. The NannyML article uses the term concept drift. Here [1] is a

The terms concept drift and (to a lesser extent) context drift have been used in AI for decades. The NannyML article uses the term concept drift. Here [1] is a 1996 paper that uses both terms. [1] https://link.springer.com/content/pdf/10.1007/BF00116900.pdf https://link.springer.com/content/pdf/10.1007/BF00116900.pdf