Where does “kertaluokka” come from?

kertaluokka (Finnish) comes from Finnish luokka, from Finnish luokki, from Proto-Slavic lǫkъ, from Proto-Balto-Slavic *lankás, from Proto-Indo-European lenk- — to bend.

kertaluokka (Finnish): order of magnitude, order

Definitions

order of magnitude, order

Ancestry of “kertaluokka”, step by step

kertaluokka traces back through two separate lines of ancestry.

via Finnish luokka

Step	Language	Word	Meaning
1	Finnish	luokka	class; class, social class; grade
2	Finnish	luokki	shaft bow
3	Proto-Slavic	lǫkъ	bow
4	Proto-Balto-Slavic	*lankás	bow
5	Proto-Indo-European	lenk-	to bend

via Finnish kerta

Step	Language	Word	Meaning
1	Finnish	kerta	time, occasion; time; times; also once, when the...
2	Proto-Finnic	kerta	time
3	Proto-Indo-European	kert-	times; to weave, twist together; time
4	Proto-Turkic	*keŕ-	to travel, tour

Every word from Proto-Indo-European lenk- →Every word from Proto-Balto-Slavic *lankás →Every word from Proto-Slavic lǫkъ →