ASSIDU'ITY, noun [Latin assiduitas. See Assiduous.] 1. Constant or close application to any business or enterprise; diligence. 2. Attention; Attentiveness to persons. Assiduities, in plural, are services rendered with zeal and constancy.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI