graded vs traveled

graded

adj
  • Having been smoothed by a grader. 

  • Forming a series decreasing or increasing in intensity of a given quality. 

traveled

adj
  • Frequented by travelers. 

  • We climbed up a well traveled path. 

  • Experienced in travel. 

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