assiduis
assiduis is a Latin form of assiduus, meaning “constant, unremitting, persistent; (assidue) continually”. It is the ablative plural feminine adjective.
Found 37 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 7.24.1: His tot rebus impedita oppugnatione milites, cum toto tempore frigore et assiduis imbribus tardarentur, tamen continenti labore omnia haec superaverunt et diebus XXV aggerem latum pedes CCCXXX, altum pedes LXXX exstruxerunt.
All forms of assiduus (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.