Habitual (7)
(Other definitions for inveterate that I've seen before include "Habitual" , "Long-formed (bad habit)" , "Hardened" , "Confirmed in (bad) habit" , "Firmly established by usage or custom" .)
(Other definitions for frequent that I've seen before include "with extreme regularity" , "Visit often" , "happening regularly at short intervals" , "Regularly visit" , "Common" .)
(Other definitions for routine that I've seen before include "Normal procedure" , "Comedian's act" , "As a rule" , "The daily round" , "Unvarying set of actions" .)
(Other definitions for chronic that I've seen before include "(Of disease) long-lasting" , "(Of illness) deep-seated" , "(Of illness) lasting a long time" , "(Of a problem) long-lasting" , "Long-lasting; deplorable" .)
'habitual' is the definition.
(I know that habitual can be written as customary)
This is all the clue.
(Other definitions for customary that I've seen before include "Normal, usual" , "Habitual, usual" , "precedent" , "In accordance with convention" , "Conventional" .)
'habitual' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for usual that I've seen before include "familiar" , "Drink repeatedly taken" , "In accordance with regular practice" , "Common, normal" , "Normal, habitual" .)