Meaning of the word assiduity in English

What does assiduity mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

assiduity

US /ˌæs.ɪˈduː.ə.t̬i/
UK /ˌæs.ɪˈdʒuː.ə.ti/

Noun

great care and attention to detail:

Example:
They researched the subject with great assiduity.