curvilinear vs unciform

curvilinear

adj
  • Having bends; curved; curvilineal. 

  • Formed by curved lines. 

unciform

adj
  • Of the shape of a hook; hook-shaped. 

noun
  • The hamate bone. 

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