Old Maid vs connector

Old Maid

noun
  • A children's card game, sometimes played with a special deck, where the object of the game is for each player to find matches for all the cards in his hand, without being stuck with the single unmatchable card. 

  • The unmatchable card itself. 

connector

noun
  • One who connects. 

  • A line connecting two shapes in presentation software. 

  • A device (or, more precisely, a mating pair of devices, often a plug and a socket) for connecting together two wires, cables, or hoses, allowing electricity or fluid to flow but also allowing easy disconnection and reconnection when necessary. 

  • A highway or freeway road which connects to another highway or freeway. It can be part of an interchange or a longer roadway such as the 1.5 mile (2.5 kilometer) U.S. Route 24 Connector. 

  • A software component that provides access from an application program to an external database or data source, such as a JDBC connector. 

  • Any of a group of cards of consecutive face value, useful in forming straights etc. 

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