Still you know there are agues which return at periods of either three, six, or nine years.
"The Man-Wolf and Other Tales"
Emile Erckmann and Alexandre Chatrian
Such indeed is the character of the climate throughout the Jheels, where fevers and agues are rare; and though no situations can appear more malarious to the common observer than Silhet and Cachar, they are in fact eminently salubrious.
"Himalayan Journals V2."
J. D. Hooker
Notwithstanding this, when the water is drawn off the fields, in August, the whole country is subject to agues and fevers.
"Memoir, Correspondence, And Miscellanies, From The Papers Of Thomas Jefferson"
Thomas Jefferson