Occasionally people mention that you can see statistics on what cards are used most frequently on RingsDB. For some reason I cannot find anything like that. Can someone help me out?

If you go to hallofbeorn.com, by the card stats it shows a certain number of ring icons. They denote popularity on ringsdb.

The author of RingsDB posted these a while back, so they may be out of date:

Most popular cards overall:

http://pastebin.com/fHDYCWT7

Most popular cards in decks containing at least 1 card from the Angmar Awakened cycle (i.e. modern decks)

http://pastebin.com/f6ezh1Jg

My website also has statistics:

http://seastan.github.io/#/deck/community (click on "get stats" on the right)