anchoress vs hikikomori

anchoress

noun
  • A female anchorite. A woman who chooses to withdraw from the world to live a solitary life of prayer and contemplation. 

  • An anchorwoman. 

hikikomori

noun
  • A reclusive person of this kind. 

  • A Japanese phenomenon whereby an individual becomes a recluse from society, typically remaining isolated in a single room at home for a very long period. 

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