fabric vs perigone

fabric

noun
  • The appearance of crystalline grains in a rock. 

  • A material made of fibers, a textile or cloth. 

  • Interconnected nodes that look like a textile fabric when diagrammed. 

  • The framework underlying a structure. 

  • The texture of a cloth. 

verb
  • To cover with fabric. 

perigone

noun
  • A sac surrounding the generative bodies in the gonophore of a hydroid. 

  • perianth 

  • In mosses, the involucral bracts of a male flower. 

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