haarder vs springer

haarder

noun
  • Planiliza haematocheilus, the redlip mullet, a mugilid fish. 

springer

noun
  • A spring salmon. 

  • A springer spaniel. 

  • A person that springs. 

  • A springbok. 

  • A stone at the base of an arch (from which the arch springs). 

  • A springing cow. 

  • Anything that springs. 

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