printing house vs printworker

printing house

noun
  • Synonym of printshop: a place to make personal copies. 

  • An institution or commercial company chiefly devoted to printing. 

  • The building where printing occurs. 

printworker

noun
  • Synonym of printmaker, a person who works making prints of works of art, (particularly) a relatively unskilled employee. 

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