What is another word for "rareness"?

Roget's Thesaurus (1911) lists these synonyms for "rareness": all, almost, and, between, blue, diamond, ever, experience, far, few, fewness, for, hardly, has, infrequency, infrequent, infrequently, inhabitant, memory, million, moon, much, not, often, once, one, previous, pro, rare, rarely, rarity, scarce, scarcely, seldom, seldomness, since, teeth, the, unfrequent, unheard.