knitting vs wall plug

knitting

noun
  • overhead electrification wires, OHLE 

  • Material that has been, or is being knitted. 

  • The action of the verb to knit; the process of producing knitted material. 

wall plug

noun
  • An electric socket. 

  • A fixing that allows screws to be fitted into masonry walls, a dowel or screw anchor. 

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