detachment vs parting

detachment

noun
  • The action of detaching; separation. 

  • 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. 

  • Absence of bias; impartiality; objectivity. 

  • Any smaller portion of a main body separately employed. 

parting

noun
  • The act of parting or dividing; the state of being parted; division; separation. 

  • The surface of the sand of one section of a mould where it meets that of another section. 

  • A joint or fissure, as in a coal seam. 

  • The dividing line formed by combing the hair in different directions; part (US) 

  • The separation and determination of alloys; especially, the separation, as by acids, of gold from silver in the assay button. 

  • A farewell, the act of departing politely. 

  • The breaking, as of a cable, by violence. 

  • Lamellar separation in a crystallized mineral, due to some other cause than cleavage, as to the presence of twinning lamellae. 

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