encourage vs invite

encourage

verb
  • To spur on, strongly recommend. 

  • To mentally support; to motivate, give courage, hope or spirit. 

  • To foster, give help or patronage 

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 encourage and invite occurred in a corpus of books? (source: Google Ngram Viewer )