The Collaborative International Dictionary of English v.0.48:
Fewness \Few"ness\, n. 1. The state of being few; smallness of number; paucity. --Shak. [1913 Webster] 2. Brevity; conciseness. [Obs.] --Shak. [1913 Webster]WordNet (r) 3.0 (2006):
fewness n 1: the quality of being small in number