accessibility vs detachment

accessibility

noun
  • The quality of being accessible, or of admitting approach; receptiveness. 

  • Features that increase software usability for users with certain impairments. 

detachment

noun
  • Absence of bias; impartiality; objectivity. 

  • A permanent unit organized for special duties. 

  • Indifference to the concerns of others; disregard; nonchalance; aloofness. 

  • The state of being detached or disconnected; insulation. 

  • The separation of a military unit from the main body for a particular purpose or special mission. 

  • The unit so dispatched. 

  • The action of detaching; separation. 

  • Any smaller portion of a main body separately employed. 

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