desuetude vs dilapidation

desuetude

noun
  • The state when something (for example, a custom or a law) is no longer observed nor practised; disuse, obsolescence; (countable) an instance of this. 

dilapidation

noun
  • Ecclesiastical waste: impairing of church property by an incumbent, through neglect or intentionally. 

  • The state of being dilapidated, reduced to decay, partially ruined. 

  • The act of dilapidating, damaging a building or structure through neglect or intentionally. 

  • Money paid at the end of an incumbency by the incumbent or his heirs for the purpose of putting the parsonage etc. in good repair for the succeeding incumbent. 

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