inscription vs siggy

inscription

noun
  • The act of inscribing. 

  • Text carved on a wall or plaque, such as a memorial or gravestone. 

  • Words written in the front of a book as a dedication. 

  • The text on a coin. 

siggy

noun
  • A sig (signature used in posted messages). 

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