SF vs Fantasy, Cthulhu vs Godzilla, Vampires vs Zombies - Answered!

Just discovered the Google Ngram Viewer, which searches out keywords in books, and displays them as trends over time. Sadly it only goes up to 2008, but this is still a lot of fun.

Click any of the charts to enlarge them - and more after the jump.

I'm not suprised that ghosts dominate, but I wonder if zombies give vampires a closer run for 2nd in the post 2008 period...

Obviously relevant to more than genre fiction, but still kind of interesting. I wonder what the modern equivalent of atom...