Whether their assiduousness went too far in the case of Mr Belhadj is for Sir Peter's inquiry to determine.
From the economist.com
United's assiduousness has made late Red winners a characteristic of clashes between the sides in this era, with Rooney's extraordinary strike at Old Trafford in February just the latest.
From the independent.co.uk
Agnew on the trail in 1972 was a model of assiduousness, going out of his way to flatter every Republican officeholder or seeker in his travels, be he the Senator or a county clerk.
From the time.com
More examples
Assiduity: great and constant diligence and attention
Diligence is a zealous and careful nature in one's actions and work, exemplified by a decisive work ethic, budgeting of one's time, monitoring one's own activities to guard against laziness, and putting forth full concentration in one's work. Diligence is usually promoted in work places. ...