unsystematically

In Renaissance Italy, antiquarians like Leon Battista Alberti and Poggio Bracciolini began to promote the study and preservation of Roman ruins, which, to that point, had been unsystematically pushed aside as the city expanded.

From New York Times ● Nov. 9, 2012

In Washington, Cooper labors unsystematically but tirelessly seven days a week, on an average of eleven hours a day.

From Time Magazine Archive

This fallacy—of supposing that we do a thing by instinct simply because we learned to do it unsystematically and without formal teaching—seems a curious enough climax to the misconceptions of literary science.

From The English Novel And the Principle of its Development by Sidney Lanier

It is, however, granted capriciously and unsystematically, without those checks and regulations which, if there were a general system, would be adopted to make it safe and effective.

From Chambers's Edinburgh Journal, No. 426 Volume 17, New Series, February 28, 1852 by William Chambers

Great injury is done to the service of God our Lord and of his Majesty the king, if such an institution is managed extravagantly, ineffectively, or unsystematically.

From The Philippine Islands, 1493-1898 — Volume 10 of 55 1597-1599 Explorations by Early Navigators, Descriptions of the Islands and Their Peoples, Their History and Records of the Catholic Missions, as Related in Contemporaneous Books and Manuscripts, Showing the Political, Economic, Commercial and Religious Conditions of Those Islands from Their Earliest Relations with European Nations to the Close of the Nineteenth Century by James Alexander Robertson