Accustomed, a.
1. Familiar through use; usual; customary. "An accustomed action." Shak.
2. Frequented by customers. [Obs.] "A well accustomed shop." Smollett.
Shades of meaning
Fernald has no entry of its own for accustomed; he lists it under addicted, usual.
Where he writes about it:
A man may be accustomed to labor, attached to his profession, devoted to his religion, given to study or to gluttony (in the bad sense, given over, or given up, is a stronger and more hopeless expression, as is abandoned). — from addicted