The boy had been his companion for years: and from assuetude had become, as it were, a part of himself.    From Wordnik.com.  [The Pirate] Reference

It is not the honest tradesman who makes a rapid fortune; indeed, it is doubtful whether he could carry on his business; and yet, from assuetude and not being taxed with dishonesty, the shopkeeper scarcely ever feels that he is dishonest.    From Wordnik.com.  [Diary in America, Series Two] Reference

A fact that no one knows his own country; from assuetude and, perhaps, from the feelings of regard which we naturally have for our native land, we pass over what nevertheless does not escape the eye of a foreigner.    From Wordnik.com.  [Diary in America, Series Two] Reference

She had recovered her health, her bloom, and her spirits, and not having had any source of irritation, her serenity of temper had been regained; and Mrs Rainscourt, to whose extreme beauty, from assuetude, he had before been blind, now appeared to him, after so long an absence, quite a different person from the one whom he had quitted with such indifference; and as he surveyed her, he seemed to feel that freshness of delight unknown to vitiated minds, except when successful in their search after "something new.".    From Wordnik.com.  [The King's Own] Reference