Oops, penis-vagina was still set to German, but those are words in that language too. (Latin!)
Okay one more round for the day...
(Would be more useful to see the frequency of the terms "association" and "network" as used in the social-science sense.)
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(German - where 1940 often seems to be interesting)
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These terms are not precise (and nuclear can also refer to weapons) but...
Interesting rise in all of them around 1980.
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Hippies and Rappers had the most dramatic explosions...
I tried to throw in "mods" but that one explodes to a level above all of them after 2000, for reasons that have nothing to do with discrete, easily identified youth subcultures in music, fashion and street lifestyle.
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