desirable vs unconscionable

desirable

noun
  • A thing that people want; something that is desirable. 

adj
  • Worthy to be desired; pleasing; agreeable. 

unconscionable

adj
  • Excessive, imprudent or unreasonable. 

  • Not conscionable; unscrupulous and lacking principles or conscience. 

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