extrude vs obtrude

extrude

verb
  • To push or thrust out. 

  • To expel; to drive off. 

  • To form or shape (a metal, plastic etc.) by forcing it through a die or an opening. 

obtrude

verb
  • To proffer (something) by force; to impose (something) on someone or into some area. 

  • To impose (oneself) on others; to cut in. 

  • To become apparent in an unwelcome way, to be forcibly imposed; to jut in, to intrude (on or into). 

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