recession vs retirement

recession

noun
  • The act or an instance of receding or withdrawing. 

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

  • 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. 

  • The act of ceding something back. 

retirement

noun
  • The act of leaving one's career or employment permanently. 

  • An act of retiring; withdrawal. 

  • The state of being retired; seclusion. 

  • The state of having permanently left one's employment, now especially at reaching pensionable age; the portion of one's life after retiring from one's career. 

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