Lewis & Short

ōtĭōsĭtas, ātis, f. [otiosus], leisure, idleness (late Lat.).

  1. I. Lit.: multam mahtiam docuit otiositas, Vulg. Ecclus. 33, 29.
  2. II. Transf., a writing composed at leisure moments (post-class.): suas otiositates edere, the fruils of leisure, poems, Sid. Ep. 2, 10.