decrepitude vs reconstruction

decrepitude

noun
  • the state of being decrepit or worn out from age or long use 

reconstruction

noun
  • The act of restoring something to an earlier state. 

  • A result of linguistic reconstruction; a model representing an unattested linguistic unit: a phoneme, a morpheme or a word. 

  • A result of an attempt to understand in detail how a certain result or event occurred. 

  • A thing that has been reconstructed or restored to an earlier state. 

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