Rap Genius is launching Rap Stats, which is their version of Google Trends for every rap song in its catalog, going back to 1988. Search a word in Rap Stats, and you'll get a grid of how frequently that word has been used in rap. Ever wonder how often the word "swagg" has been used in hip-hop since 1988? Here's the tool for you. Rap Stats lets the viewer discover, in great detail, the histories of regional genres, slang, trends and plenty more.