internment vs liberty

internment

noun
  • Confinement within narrow limits, as of foreign troops, to the interior of a country. 

liberty

noun
  • A short period when a sailor is allowed ashore. 

  • A breach of social convention. 

  • The condition of being free to act, believe or express oneself as one chooses. 

  • A local division of government administration in medieval England. 

  • The condition of being free from control or restrictions. 

  • Freedom from excessive government control. 

  • The condition of being free from imprisonment, slavery or forced labour. 

  • An empty space next to a group of stones of the same color. 

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