Usage examples for facetiousness:

• Dwight made a gallant effort to retrieve the fallen fortunes of their evening meal, and turned upon Di, who had just entered, and with exceeding facetiousness inquired how Bobby was. "Miss Lulu Bett" – Zona Gale

• The danger is not apparent in Mr. James's case, and I confess that I read him with a relief in the comparative immunity that he affords from the national facetiousness "Entire PG Edition of The Works of William Dean Howells" – William Dean Howells

• As soon as Dale went to order his gig the clumsy facetiousness was renewed. "The Devil's Garden" – W. B. Maxwell