The quality of being unwonted or unusual; deviation from custom or habit.
1924: ARISTOTLE. Metaphysics. Translated by W. D. Ross. Nashotah, Wisconsin, USA: The Classical Library, 2001. ARISTOTLE. Metaphysics. Book 1, Part 5.
… we demand the language we are accustomed to, and that which is different from this seems not in keeping but somewhat unintelligible and foreign because of its unwontedness.