come back vs go west

come back

verb
  • To return to one's possession, especially of memories. 

  • To retort. 

  • To return to a former state, usually a desirable one; to become fashionable once more. 

  • To return to a place. 

go west

verb
  • Synonym of set: to move toward the western horizon, to go down. 

  • Used other than figuratively or idiomatically: see go, west. 

  • To move to the American West, particularly (historical) during the 19th century era. 

How often have the words come back and go west occurred in a corpus of books? (source: Google Ngram Viewer )