planetoid vs terrene

planetoid

noun
  • A dwarf planet 

  • An asteroid of any size 

  • An asteroid-like body in an orbit beyond the asteroid belt, such as a centaur or Kuiper belt object 

  • A larger, planetary, body in orbit around the Sun, such as Vesta or (candidate) dwarf planets such Eris or Sedna 

terrene

noun
  • The Earth's surface; the earth; the ground. 

adj
  • Pertaining to earth or the material world; earthly, terrestrial (as opposed to heavenly or marine). 

  • Made of matter (as opposed to antimatter). 

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