unplumbed vs untraveled

unplumbed

adj
  • Not measured for depth, with or as if with a plumb. 

  • Not assayed or measured in any way. 

untraveled

adj
  • Bearing few travellers 

  • Not having travelled 

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