barren vs monotonic

barren

adj
  • Unproductive; fruitless; unprofitable; empty. 

  • Unable to bear children; sterile. 

  • Of poor fertility, infertile; not producing vegetation. 

  • Mentally dull; stupid. 

  • Bleak. 

noun
  • An area of low fertility and habitation, a desolate place. 

monotonic

adj
  • Uttered in a monotone; monotonous. 

  • said of a function that either never decreases or never increases as its independent variable increases. 

  • of or using the Greek system of diacritics which discards the breathings and employs a single accent to indicate stress. It replaced polytonic system in 1982. 

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