bast vs rind

bast

noun
  • Fibre made from the phloem of certain plants and used for matting and cord. 

rind

verb
  • To remove the rind from. 

noun
  • tree bark 

  • A hard, tough outer layer, particularly on food such as fruit, cheese, etc 

  • The gall, the crust, the insolence; often as "the immortal rind" 

  • An iron support fitting used on the upper millstone of a grist mill. 

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