Both Uses

inquiry
in
The Apology, by Plato
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And so I go about the world, obedient to the god, and search and make enquiry into the wisdom of any one, whether citizen or stranger, who appears to be wise; and if he is not wise, then in vindication of the oracle I show him that he is not wise; and my occupation quite absorbs me, and I have no time to give either to any public matter of interest or to any concern of my own, but I am in utter poverty by reason of my devotion to the god.†

unconventional spelling: This is spelled "inquiry" in U.S. English.
—Hence has arisen the prejudice against me; and this is the reason of it, as you will find out either in this or in any future enquiry.†
*

Definitions:

(1) (inquiry)
a question or investigation -- especially one meant to gather information or find out the truth
(2) (meaning too rare to warrant focus)