desire vs purpose

desire

verb
  • To express a wish for; to entreat; to request. 

  • To require; to demand; to claim. 

  • To miss; to regret. 

  • To want emotionally or sexually. 

  • To want; to wish for earnestly. 

  • To put a request to (someone); to entreat. 

noun
  • Someone or something wished for. 

  • Strong attraction, particularly romantic or sexual. 

  • The feeling of desiring; an eager longing for something. 

  • Motivation. 

purpose

verb
  • To have or set as one's purpose or aim; resolve to accomplish; intend; plan. 

  • To have (an) intention, purpose, or design; to intend; to mean. 

noun
  • meaning for existing or doing something. 

  • Resolution; determination. 

  • Function, role. 

  • The end for which something is done, is made or exists. 

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