Pinhead vs endo

Pinhead

noun
  • A member of the Provisional IRA. 

endo

noun
  • A labor contracting system where workers are hired by employment agencies to work for a specific period of time until being replaced and prohibited from being re-hired. 

  • A bicycle or motorcycle trick where the bike is ridden on the front wheel. 

  • A person employed under this system. 

  • A crash in which the back wheel of the bicycle lifts off the ground and the cyclist is hurtled over the handlebars. 

  • Marijuana. 

verb
  • To suffer an endo (crash). 

  • To perform an endo (trick). 

How often have the words Pinhead and endo occurred in a corpus of books? (source: Google Ngram Viewer )