chalybeate vs flatiron

chalybeate

noun
  • A mineral water containing iron, a voguish general remedy during the 17th-19th century. 

adj
  • Containing dissolved salts of iron. 

  • Tasting of iron, said of mineral water. 

flatiron

noun
  • A simple iron (for pressing laundry) which is heated on a stove. 

  • A steeply sloping triangular landform created by the differential erosion of a steeply dipping, erosion-resistant layer of rock overlying softer strata. 

  • a quadrilateral with two parallel sides, one of which is very short, and whose non-parallel sides are longer than either parallel side. 

  • A pair of metal tongs with heated ceramic plates used for straightening hair. 

adj
  • Having a flatiron shape. 

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