detachment vs linkage

detachment

noun
  • 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. 

  • Absence of bias; impartiality; objectivity. 

  • Any smaller portion of a main body separately employed. 

linkage

noun
  • A connection or relation between things or ideas. 

  • The act or result of linking: the combination of multiple object files into one executable, library, or object file. 

  • A United States foreign policy, during the 1970s détente in the Cold War, of persuading the Soviet Union to co-operate in restraining revolutions in the Third World in return for nuclear and economic concessions. 

  • A mechanical device that connects things. 

  • The property of genes of being inherited together. 

  • A set of definitely related languages for which no proto-language can be derived, typically a group of languages within a family that have formed a sprachbund. 

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