joe vs mxn

joe

noun
  • A male; a guy; a fellow. 

  • Synonym of johannes (“An old Portuguese gold coin bearing a figure of John V of Portugal.”) 

  • Coffee. 

  • A spy, especially a double agent. 

mxn

noun
  • Feminist spelling of man 

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