ectype vs imitation

ectype

noun
  • A copy, reproduction; especially as contrasted with the original, archetype, or prototype. 

  • An object in relievo or embossed. 

  • An idea or impression that corresponds to external reality. 

  • An impression (in wax, clay, &c.) of a seal or medal. 

imitation

noun
  • A copy or simulation; something that is not the real thing. 

  • The act of imitating. 

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