Commodiousness n. State of being commodious; suitableness for its purpose; convenience; roominess. "Of cities, the greatness and riches increase according to the commodiousness of their situation.""The commodiousness of the harbor."
... doorcase being enriched with cartouches, volutas, and fruit, very excellently carved under a pediment, and opposite to this on the north side is the like doorcase. And, in brief, all the apertures are not only judiciously disposed for commodiousness, illumination of the fabric, ... — London in 1731 • Don Manoel Gonzales