From Wiktionary, the free dictionary
From konz + -ni.
konz-ni
- at any time, at some time or another, ever
- Zajceva, N. G., Mullonen, M. I. (2007) “когда-нибудь”, in Uz’ venä-vepsläine vajehnik / Novyj russko-vepsskij slovarʹ [New Russian–Veps Dictionary][1], Petrozavodsk: Periodika