Ever wished for a way to visualize the Zeitgeist? It's here.
Google just rolled out a way to graph text frequency from their vast googlebooks database. Here's the frequency of "bicycle" from 1850-2008. It clearly shows the three big bike booms.
Comparing "autoist" and "bicyclist," or "automobile" and "bicycle," wasn't nearly as interesting. If you play with it and hit on an interesting graph, do share!