roundsman vs subeditor

roundsman

noun
  • A policeman who acts as inspector. 

  • A worker who makes rounds, especially in order to deliver goods. 

subeditor

noun
  • An assistant editor, usually in a specific department of a newspaper. 

  • A copy editor at a newspaper or magazine. 

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