The Collaborative International Dictionary of English v.0.48:
Commonplaceness \Com"mon*place`ness\, n. The quality of being commonplace; commonness. [1913 Webster] common roomWordNet (r) 3.0 (2006):
commonplaceness n 1: ordinariness as a consequence of being frequent and commonplace [syn: commonness, commonplaceness, everydayness] [ant: uncommonness]