constant and close application - (often plural)
devoted attention
WordReference Random House Unabridged Dictionary of American English © 2025
as•si•du•i•ty
(as′i do̅o̅′i tē, -dyo̅o̅′-),USA pronunciation n., pl. -ties.
- constant or close application or effort;
diligence;
industry. - assiduities, devoted or solicitous attentions.
- Latin assiduitās. See assiduous, -ity
- 1595–1605
Collins Concise English Dictionary © HarperCollins Publishers::
'assiduity' also found in these entries (note: many are not synonyms or translations):