hickey vs thingumajig

hickey

noun
  • A bruise-like mark made during petting by pressing the mouth to the skin on one’s partner’s body and sucking. 

  • A serif or other ornamentation on type. 

  • A tool for making smooth, semicircular bends in conduit and pipe. 

  • A printing defect caused by foreign matter on the printing surface resulting in a ring where the ink is missing, appearing as a spot of ink surrounded by a halo, or as an unprinted spot within a solid printed area. 

  • Local swelling in a tissue area, especially skin, often due to injury. 

  • An object whose name is unknown or cannot be recalled. 

  • An unintended negative outcome or loss in regards to a deal or action. 

thingumajig

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