argonaut vs would-be

argonaut

noun
  • An adventurer on a dangerous but rewarding quest. 

  • Any of several species of shelled octopods of the family Argonautidae (of which only the genus Argonauta is not extinct). 

would-be

noun
  • One who aspires to something. 

  • One's fiancé or fiancée. 

adj
  • Attempting or desiring something. 

  • Unfulfilled; frustrated in realizing a goal, ambition, etc. 

How often have the words argonaut and would-be occurred in a corpus of books? (source: Google Ngram Viewer )