This is a really cool new tool from Google Labs.
It’s called Books Ngram and allows data visualisation of information across the last two centuries, courtesy of Google’s online book indexing.
Props to Information Is Beautiful for flagging this already, and McCandless has already posted some examples here.
Had a crack at a couple myself below.
Obviously the two world wars explain the 20th century spikes – but love seems to be on an overall long-term decline