buckling vs contortion

buckling

noun
  • The act of fastening a buckle. 

  • A folding into hills and valleys. 

  • The action of collapsing under pressure or stress. 

  • A young male domestic goat of between one and two years. 

  • Smoked herring. 

adj
  • Wavy; curly, as hair. 

contortion

noun
  • The act of contorting, twisting or deforming something, especially oneself. 

  • A form of acrobatic display which involves the dramatic bending and flexing of the human body. 

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