What is the order of rarity for T205 and T206 backs?

[zljones]

Hello everyone, I am new to this forum and also to collecting pre1920 cards. I have been rapidly building my T205 collection, and soon enough will be moving onto T206. I have been reading some of the threads about the backs of the cards and am becoming increasingly interested in the different backs. I also would like to gain further knowledge about the backs before I start spending money on T206s. What is the order of scarcity from most common to least common of the backs for T205 and T206? Beckett has a breif description but only for T206. I am especially wondering about T205, which are scare and which are not scarce.
From what I learned Lenox, Uzit, Hindu, Cycle, and Drum are some really scarce ones. While Piedmont and Sweet Caporal are super common. Can anyone give me an order or tell me what's not common with T205? Thanks