ectype vs photostat

ectype

noun
  • An object in relievo or embossed. 

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

  • An idea or impression that corresponds to external reality. 

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

photostat

noun
  • Positive (black on white) or negative (white on black) reproduction of printed matter or artwork made on a photostat machine, which uses photographic paper instead of a transparent negative, and uses a prism to render the paper negative readable instead of reversed. 

  • A photocopy made using a photocopier. 

verb
  • To make such a photocopy of. 

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