confound vs invite

confound

verb
  • To stun or amaze. 

  • To combine in a confused fashion; to mingle so as to make the parts indistinguishable. 

  • To make something worse. 

  • To cause to be ashamed; to abash. 

  • To defeat, to frustrate, to thwart. 

  • To fail to see the difference; to mix up; to confuse right and wrong. 

  • To perplex or puzzle. 

noun
  • A confounding variable. 

invite

verb
  • To encourage. 

  • To ask for the presence or participation of someone or something. 

  • To allure; to draw to; to tempt to come; to induce by pleasure or hope; to attract. 

  • To request formally. 

noun
  • An invitation. 

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