printed matter vs printing house

printed matter

noun
  • Printed material produced by printers and publishers, including books, magazines, brochures, booklets, publicity material and newspapers, especially in relation to cheaper postage rates on such material. 

printing house

noun
  • An institution or commercial company chiefly devoted to printing. 

  • The building where printing occurs. 

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

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