Google's tool for viewing trends of search: http://www.google.com/trends
You can do comparison too. Here's what I tried:
republican, democrat (and democrat, republican)
regression model,decision tree,neural networks,support vector machine
response model, risk model, predictive model
intelligence,wisdom,smart,knowledge
harvard, yale, stanford
china,india (within US, Germany, United Kingdom)
buddism,taoism,hinduism,judaism,christian,islam
data mining, statistical analysis, analytics
