argonaut vs itinerant

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). 

itinerant

noun
  • One who travels from place to place. 

  • A member of the Travelling Community, whether settled or not. 

adj
  • Habitually travelling from place to place. 

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