astringent vs blotter acid

astringent

noun
  • A substance which draws tissue together, thus restricting the flow of blood. 

adj
  • Extremely sour, bitter. 

  • Sharp, caustic, severe. 

  • Causing a dry or puckering mouthfeel; characteristic of foods with high tannin content, such as certain kinds of berries and citrus fruits. 

  • Having the effect of drawing tissue together; styptic. 

blotter acid

noun
  • Blotter paper impregnated with the drug LSD, to be taken orally. 

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