deprivation vs helotism

deprivation

noun
  • The state of being deprived 

  • lack 

  • The act of depriving, dispossessing, or bereaving; the act of deposing or divesting of some dignity. 

  • The taking away from a clergyman of his benefice, or other spiritual promotion or dignity. 

helotism

noun
  • The permanent oppression of a nominally free group of people 

  • A form of mutualism in which one species is forced to perform tasks for another, for their mutual benefit 

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