intention vs purpose

intention

verb
  • To intend. 

noun
  • The goal or purpose. 

  • A course of action that a person intends to follow. 

  • The process of the healing of a wound. 

  • A stretching or bending of the mind toward an object or a purpose (an intent); closeness of application; fixedness of attention; earnestness. 

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 intention and purpose occurred in a corpus of books? (source: Google Ngram Viewer )