putrescence vs wet rot

putrescence

noun
  • The condition of being putrid; decay 

  • Putrid matter 

wet rot

noun
  • A soft rot in which the decayed tissues are markedly watery. 

  • Decay of timber by fungi that attack wood having high moisture content. 

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