suffusion vs tisane

suffusion

noun
  • The act of pouring a liquid over or soaking something. 

  • coat, coating, film, plating. 

  • The state of becoming red on the surface. 

  • The state of being wet. 

tisane

noun
  • A medicinal drink, originally made from barley soaked in water. 

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