Another fun one: terrorism,socialism,communism: http://ngrams.googlelabs.com/graph?content=terrorism%2Csocialism%2Ccommunism&year_start=1920&year_end=2008&corp

Another fun one: terrorism,socialism,communism: http://ngrams.googlelabs.com/graph?content=terrorism%2Csocialism%2Ccommunism&year_start=1920&year_end=2008&corpus=0&smoothing=3 http://ngrams.googlelabs.com/graph?content=terrorism%2Csocia...