fabrication vs figment of one's imagination

fabrication

noun
  • The act of fabricating, framing, or constructing; construction; manufacture 

  • The act of cutting up an animal carcass as preparation for cooking; butchery. 

  • That which is fabricated; a falsehood 

figment of one's imagination

noun
  • A product of the imagination. 

How often have the words fabrication and figment of one's imagination occurred in a corpus of books? (source: Google Ngram Viewer )