printing vs printing process

printing

verb
  • To inadequately carry a concealed weapon such that its silhouette is visible on the person wearing it. 

noun
  • The process or business of producing printed material by means of inked type and a printing press or similar technology. 

  • Material that has been printed. 

  • All the copies of a publication that have been printed in one batch. 

  • Written characters that are not joined up. 

printing process

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