clayey vs earthen

clayey

adj
  • Composed of clay or containing (much) clay; clayish. 

  • Resembling clay; claylike, clayish. 

  • Of the human body, as contrasted with the soul; bodily, human, mortal. 

  • Covered or dirtied with clay. 

earthen

adj
  • Made of clay (especially said of pottery). 

  • Made of earth or mud. 

verb
  • to provide or add soil to 

  • to make earthly or earthlike 

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