SEAT vs cistern

SEAT

noun
  • An automobile from Sociedad Española de Automóviles de Turismo 

  • Single engine air tanker. 

name
  • Sociedad Española de Automóviles de Turismo, a Spanish automobile manufacturer. 

cistern

noun
  • The vessel surrounding the condenser in a steam engine. 

  • In a flush toilet, the container in which the water used for flushing is held; a toilet tank. 

  • A cisterna. 

  • A reservoir or tank for holding water, especially for catching and holding rainwater for later use. 

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