paucity (pô′sĭ-tē), noun
1. Smallness of number; fewness.
2. Smallness of quantity.
Etymology: 1400s, from Latin paucus, few, little.
dearth (dûrth), noun
1. Scarcity that makes dear.
Etymology: 1200s, from Middle English derthe, costly or dear.
It is not a paucity of vacation days that keeps me at the office; it is the dearth of good opportunities to leave for an extended period without the fear of returning to screaming chaos.