outlet vs screw anchor

outlet

noun
  • A wall-mounted device such as a socket or receptacle connected to an electrical system at which current is taken to supply utilization equipment or appliances. 

  • A vent or similar passage to allow the escape of something. 

  • A river that runs out of a lake. 

  • Something which allows for the release of one's desires. 

  • A shop that sells the products of a particular manufacturer or supplier. 

screw anchor

noun
  • A fixing that allows screws to be fitted into masonry walls; called a wall plug in UK English. 

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