arid vs monotone

arid

adj
  • Devoid of value. 

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

  • Very dry. 

monotone

adj
  • Being, or having the salient properties of, a monotone function. 

  • Having a single unvaried pitch. 

noun
  • A piece of writing in one strain throughout. 

  • A single unvaried tone of speech or a sound. 

verb
  • To speak in a monotone. 

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