Definition of "unusualness"

The pale, inscrutable determinateness, and flinchless intrepidity of Pierre, now began to domineer upon them; for any social unusualness or greatness is sometimes most impressive in the retrospect.

1852 July, Herman Melville, “Book XXIV. Lucy at the Apostles’.”, in Pierre: Or, The Ambiguities, New York, N.Y.: Harper & Brothers, […], section IV, page 445

`Was it a housekeeper?' He was the rouseabout, wearing his best clothes with awful unusualness.

1902, Barbara Baynton, edited by Sally Krimmer and Alan Lawson, Bush Studies (Portable Australian Authors: Barbara Baynton), St Lucia: University of Queensland Press, published 1980, page 48