bagger vs robber

bagger

noun
  • One who bags. 

  • A retail employee who bags customers' purchases and carries them to the customers' vehicles. 

  • A touring motorcycle equipped with saddlebags. 

robber

noun
  • A person who robs. 

  • An animal who robs. 

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