Steady attention and effort, as to one's occupation
He was now labouring, with extreme assiduity, to ground himself in the forms and habits of literary style.
Thanks to the strictness and assiduity of its commander the regiment, in comparison with others that had reached Braunau at the same time, was in splendid condition.
During the first three or four years he spoke little, but devoted himself with assiduity to mastering parliamentary forms and the business of the house.
The tact, assiduity and dignity with which he guided the deliberations of the council made him exceedingly popular with its members.