disquiet vs inertness

disquiet

verb
  • To make (someone or something) worried or anxious. 

noun
  • Lack of quiet; absence of tranquility in body or mind 

inertness

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

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

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

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