Assiduousness
The Century Dictionary and Cyclopedia
noun.
The quality of being assiduous; constant or diligent application.
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
Conscientious
and
unremitting
diligence
.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
great and constant diligence and attention
Word Usage
"Despite this assiduousness, he inevitably faced gaps when he started to write."
Hypernym
Words that are more generic or abstract
diligence
industriousness
industry
Hyponym
Words that are more specific
engrossment
intentness
singleness