vicesimation

Etymology
Probably formed by the of the  with the 🇨🇬 on the pattern of, but compare the 🇨🇬; the spelling  is an alteration of  under the influence of.

Noun

 * 1)  The  of one- of something;, the killing or putting to  of every twentieth person,  by.

Translations

 * Welsh: ugeiniant