recession vs revolving door

recession

noun
  • The act of ceding something back. 

  • A procedure in which an extraocular muscle is detached from the globe of the eye and reattached posteriorly. 

  • The act or an instance of receding or withdrawing. 

  • A period of low temperatures that causes a reduction in species; ice age. 

  • A period of reduced economic activity 

  • The ceremonial filing out of clergy and/or choir at the end of a church service. 

revolving door

noun
  • Synonym of recidivism 

  • A door that rotates around a central pivot. 

  • A movement of personnel between roles as legislators and regulators, on the one hand, and members of the industries affected by the legislation and regulation, on the other. 

  • A system or institution in which people exit and immediately reenter. 

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