comedown vs descending

comedown

noun
  • A sudden drop to a lower status, condition or level; a disappointment or letdown. 

  • A calm, mellow period experienced after the initial high from taking drugs. 

descending

noun
  • A descent. 

adj
  • Ordered such that each element is less than or equal to the previous element. 

  • Moving or sloping downwards. 

  • Becoming lower in pitch. 

  • Causing a sequence to follow a descending order. 

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