forged vs spurious

forged

adj
  • Fake (as documents); falsified. 

  • Forged identification documents were used to enter the building. 

  • Fabricated by forging or at a forge, by working hot metal 

spurious

adj
  • False, not authentic, not genuine. 

  • Extraneous; stray; not relevant or wanted. 

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