cementum vs ink

cementum

noun
  • A bony substance that covers the root of a tooth; cement. 

ink

noun
  • A particular type, color or container of this fluid. 

  • Tattoo work. 

  • Publicity. 

  • Cheap red wine. 

  • The black or dark-colored fluid ejected by squid, octopus etc, as a protective strategy. 

  • A pigment (or dye)-based fluid used for writing, printing etc. 

verb
  • To sign (a contract or similar document). 

  • To apply a tattoo to (someone). 

  • To apply ink to; to cover or smear with ink. 

  • to eject ink (sense 3) 

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