on occasion en · ADP
Meanings
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Occasionally, from time to time, now and then.
Only on rare occasion.
It is not in itself surprising that a genuine advance of knowledge should in this manner become on occasion a source of new error.
1949, F. A. Hayek, “The Intellectuals and Socialism”, in University of Chicago Law Review, volume 16, number 3, Chicago: University of Chicago, →DOI, page 425: