arid vs hairline

arid

adj
  • Very dry. 

  • Devoid of value. 

  • Describing a very dry climate. Typically defined as less than 25 cm or 10 inches of rainfall annually. 

hairline

adj
  • very thin, as thin as a hair 

noun
  • A fishing line made from hair. 

  • The line along one's forehead where hair starts growing. 

  • A very thin line in writing, drawing, or typography. 

  • A very thin fissure. 

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