1) Assiduousness 2) Concentration 3) Diligence 4) Industriousness 5) Industry 1) Assiduousness 2) Intentness 3) Zeal 
persevering application to a pursuit
• (n.) Studied and persevering attention to a person; -- usually in the plural. • (n.) Constant or close application or attention, particularly to some business or enterprise; diligence.
As`si·du'i·ty noun ; plural Assiduities [ Latin assiduitas : confer French assiduite . See Assiduous .] 1. Constant or close application or attention, particularly to some business or enterprise; diligence. « I have, with much pains and assiduity...
[n] - great and constant diligence and attention
assiduity 1. Great care and attention in doing something. 2. Persistent application or diligence; unflagging effort. 3. Constant personal attention and often obsequious solicitude.
[Wuthering Heights] careful attention.
assiduousness noun great and constant diligence and attention
constant or close application or effort; diligence; industry. · devoted or solicitous attentions.