crochet vs unknit

crochet

verb
  • To make (a piece of) needlework using a hooked needle; to make interlocking loops of thread. 

noun
  • A certain crest of enamel on the molar teeth of some rhinoceroses. 

  • Needlework made by looping thread with a hooked needle. 

unknit

adj
  • Not knitted. 

verb
  • To unravel. 

  • To undo knitted stitches by reversing the knitting motion. 

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