copy editor vs pressman

copy editor

noun
  • Someone who corrects printed material and prepares it for typesetting, printing, or online publishing. 

pressman

noun
  • Someone who operates a printing press. 

  • A journalist or newspaper reporter. 

  • one who presses clothes 

  • one who pressgangs people into naval service 

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