knitting vs wall socket

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 socket

noun
  • A mains electricity power point mounted in or on a wall inside a dwelling or other building. 

  • Any outlet or recess in a wall. 

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