invite vs require

invite

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

  • To encourage. 

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

  • To request formally. 

noun
  • An invitation. 

require

verb
  • To demand of (someone) to do something. 

  • To demand, to insist upon (having); to call for authoritatively. 

  • Naturally to demand (something) as indispensable; to need, to call for as necessary. 

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