gangbang vs run a train

gangbang

verb
  • To participate in a gangbang. 

  • To belong to a gang; to commit criminal acts as part of a gang. 

  • To beat one or a smaller amount of people as a gang. 

noun
  • The act of a street gang attacking random people on the streets and/or committing gang crimes. 

  • Gang rape. 

  • Sexual intercourse involving more than two persons, especially with a high proportion of men. 

run a train

verb
  • Synonym of gangbang: To have sex with someone as a line going one after the other. 

  • To have sex with someone multiple times in short succession. 

  • Used other than figuratively or idiomatically: see run, train. 

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