sensible vs unsound

sensible

adj
  • Able to be sensed by the senses or the psyche; able to be perceived. 

  • Acting with or showing good sense; able to make good judgements based on reason, or reflecting such ability. 

  • Characterized more by usefulness, practicality, or comfort than by attractiveness, formality, or fashionableness, especially of clothing. 

unsound

adj
  • Not whole, not solid, defective. 

  • Infirm, diseased. 

  • Not good, unreliable. 

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