Sancho had not thought it worth while to hobble Rocinante, feeling sure, from what he knew of his staidness and freedom from incontinence, that all the mares in the Cordova pastures would not lead him into an impropriety.
It was not easy for us to credit the young man’s continence, but she asserted it with such earnestness that it helped to console her distressed father, who thought nothing of what had been taken since the jewel that once lost can never be recovered had been left to his daughter.
"If it goes by good name and fame," said the bachelor, "your worship alone bears away the palm from all the knights-errant; for the Moor in his own language, and the Christian in his, have taken care to set before us your gallantry, your high courage in encountering dangers, your fortitude in adversity, your patience under misfortunes as well as wounds, the purity and continence of the platonic loves of your worship and my lady Dona Dulcinea del Toboso-"
But give me your hand, senora; I require no better protection than my own continence, and my own sense of propriety; as well as that which is inspired by that venerable head-dress;" and so saying he kissed her right hand and took it in his own, she yielding it to him with equal ceremoniousness.
There are no more uses of "incontinence" in the book.
Show samples from other sources
Since an overpopulation of wolves above the carrying capacity of the country to maintain would mean a rapid decline in the numbers of prey animals — with consequent starvation for the wolves themselves — they are forced to practice what amounts to birth control through continence.
Farley Mowat -- Never Cry Wolf
 These three beasts correspond to the triple division of sins into those of incontinence, of violence, and of fraud.