call forth vs conjure up

call forth

verb
  • To summon, to call to speak. 

  • To induce, inspire. 

conjure up

verb
  • To call up or command a spirit or devil by an incantation. 

  • To create or produce something, seemingly magically. 

  • To generate (an image or an idea) in one's mind. 

How often have the words call forth and conjure up occurred in a corpus of books? (source: Google Ngram Viewer )