application, assiduité
Diligence is the mother of good fortune.
La diligence est la mère de la bonne fortune.
His diligence and good conduct earned him the scholarship.
Son assiduité et sa bonne conduite lui ont valu la bourse.
Diligence enabled him to succeed.
Sa diligence lui a permis de réussir.
Once upon a time they used to travel by a diligence.
Autrefois, ils voyageaient en diligence.