decennium

The Apple of 2010, at the end of its decennium mirabilis, had a record of hardware innovation no other electronics firm could match.

From New York Times ● May 1, 2022

After that three pontifical briefs were obtained, each one ad decennium, empowering them to graduate students from the courses of philosophy and theology.

From The Philippine Islands, 1493-1898 — Volume 28 of 55 1637-38 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 Emma Helen Blair

In the last but one decennium of the sixteenth century, the first dramatists arose who pursued fixed literary tendencies.

From Shakspere and Montaigne by Jacob Feis

The principal poems composed in the last decennium of the eighteenth century . . . adhered still more to classic tradition.

From A History of English Romanticism in the Nineteenth Century by Henry A. (Henry Augustin) Beers

You must see that congruity requires the semi-centenary, and that Sir Walter was a full decennium behind-hand.

From Blackwood's Edinburgh Magazine, Volume 62, Number 385. November, 1847. by Various

During the decennia which immediately followed, Jewish history was practically absorbed in vain attempts to restore the old Hasmonaean kingdom.

From Prolegomena by Julius Wellhausen