descent vs luxation

descent

noun
  • An instance of descending; act of coming down. 

  • A particular extension of the idea of gluing. 

  • A falling upon or invasion. 

  • A sloping passage or incline. 

  • A drop to a lower status or condition; decline. 

  • Lineage or hereditary derivation. 

  • A way down. 

luxation

noun
  • The act of luxating, or the state of being luxated; a dislocation. 

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