Knowledge vs. Wisdom

In yet another epic showdown, below we use Google's new ngram viewer to discover which gets the most mention in books from 1800 to 2000 -- knowledge, or wisdom?

And the winner is ... knowledge. No surprise, really, and it appears to be widening its lead in the last 80 years.  Let's face it, knowledge is less mushy, less subjective, and it appears in so many more domains than wisdom.