crochet vs pigtail

crochet

noun
  • Needlework made by looping thread with a hooked needle. 

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

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

pigtail

noun
  • A short length of twisted electrical wire. 

  • A braided plait of hair; now especially, either of two braids or "tails" on the side of the head. 

  • The tail of a pig. 

  • Twisted stent terminal; stent-end, usually but not necessarily a different fastened part. 

  • The flamingo flower (anthurium) 

  • Tobacco twisted into a string or roll. 

  • A person who wears a pigtail or queue. 

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