doll vs smoke detector

doll

noun
  • A short signal post mounted on a bracket mounted on the main signal post, or on a signal gantry. 

  • A toy in the form of a human. 

  • An attractive young woman. 

  • A kind of barrier used in horse racing. 

  • The smallest or pet pig in a litter. 

  • A term of endearment: darling, sweetheart. 

smoke detector

noun
  • A device that sounds an alarm when it detects smoke or other evidence of fire. 

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