1847, Charlotte Brontë, chapter V, in Jane Eyre, 1st edition, volume II, page 132:
"Oh, no! Mason will not defy me; nor knowing it, will he hurt me—but, unintentionally, he might in a moment, by one careless word, deprive me, if not of life, yet for ever of happiness."
1990, Challenges for the Convenience Store Industry in the 1990s, page 175:
And, even if you do not unintentionally overstore your markets, over-expansion by your competitors will produce similar effects.