Comparing some of the social networks is interesting: http://chronicle.nytlabs.com/?keyword=twitter.facebook.myspa...
They didn't change connexion to connection: http://chronicle.nytlabs.com/?keyword=connexion.connection
No pedophile or paedophile before 1986? http://chronicle.nytlabs.com/?keyword=paedophile.pedophile
I'm vaguely interested about why aluminium has peaks between 1955 and 1970 (although it's always much lower than aluminum) http://chronicle.nytlabs.com/?keyword=aluminum.aluminium
A couple of words show small peaks from 2010:
metre http://chronicle.nytlabs.com/?keyword=meter.metre
labour http://chronicle.nytlabs.com/?keyword=labour.labor