uobičajeno

1. (uobičajeno je) it is customary; it is usual
   U Srbiji je uobičajeno da se gostu ponudi kafa. — In Serbia it's customary to offer a guest coffee.
   Da li je uobičajeno ostaviti bakšiš u restoranu? — Is it usual to leave a tip in a restaurant?
2. customarily; in the usual way
   Sastanak je počeo uobičajeno, tačno u devet. — The meeting started as usual, at nine sharp.

Most often used in the construction "uobičajeno je da…" and the phrase "kao što je uobičajeno".