Ascension vs descent

Ascension

name
  • Entry into heaven while still alive. 

  • The believed entry of Jesus Christ into heaven after his resurrection. 

  • A holiday celebrating the Ascension of Jesus, 40 days after Easter. 

descent

noun
  • 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. 

  • An instance of descending; act of coming down. 

  • A way down. 

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