scabrous vs serriform

scabrous

adj
  • Covered with scales or scabs; hence, very coarse or rough. 

  • Disgusting, repellent. 

  • Of music, writing, etc.: lacking refinement; unmelodious, unmusical. 

  • Difficult, thorny, troublesome. 

  • Covered with a crust of dirt or grime. 

  • Having scabers 

serriform

adj
  • notched, as the blade of a saw 

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