Process of skin release? Pick diversity

I don't regularly go on threads, but this is something that I've always wondered while playing league. What is the process of skin releases according to champs? There are champs with about 6 or more skins while there are champs with two. Some champs do not receive a skin for years while others get some decently often. Don't you think making skins for champs that rarely get them, will help increase pick diversity especially among newer players? Like urgot, I think if urgot looked better as a champ, people would be more willing to learn to play as him. Older champs like definitely don't receive skins often at all . Do you think the community could eventually vote on a champ that hasn't received love within a certain amount of time? Wouldn't it be creative to make skins for champs are neglected in the process? If i'm missing the obvious pls tell me.