WordNet sense 1 (the state of being that is commonly observed):

expectedness

WordNet sense 2 (the quality of lacking taste and refinement):

coarseness, grossness, vulgarism, vulgarity, raunch

WordNet sense 3 (ordinariness as a consequence of being frequent and commonplace):

commonplaceness, everydayness

WordNet sense 4 (sharing of common attributes):

commonality