go-slow vs sit-in

go-slow

noun
  • Deliberate slow working as a protest during an industrial dispute. 

  • A period of time spent in an unusually slow fashion. 

sit-in

noun
  • A peaceful form of protest in which people occupy an area and refuse to leave. 

adj
  • Designed to be sat in. 

How often have the words go-slow and sit-in occurred in a corpus of books? (source: Google Ngram Viewer )