inertness vs luxury

inertness

noun
  • Quality of being unreactive with other chemical compounds or elements. 

  • Absence of the power of self-motion; inertia. 

  • Lack of activity or exertion; habitual indisposition to action or motion 

luxury

noun
  • Something that is pleasant but not necessary in life. 

  • Very wealthy and comfortable surroundings. 

  • Something desirable but expensive. 

adj
  • very expensive 

  • not essential but desirable and enjoyable and indulgent. 

  • Pertaining to the top-end market segment for mass production mass market vehicles, above the premium market segment. 

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