She had been buggy-riding before, but always behind one horse, jaded, and livery, in a top-buggy, heavy and dingy, such as livery stables rent because of sturdy unbreakableness.    From Wordnik.com.  [Chapter 9] Reference

"Another thing that pleases me," continued my lady, "is the unbreakableness of the dishes.    From Wordnik.com.  [Little Rivers; a book of essays in profitable idleness] Reference