recession vs subduction

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. 

subduction

noun
  • The act of subducting or taking away. 

  • The process of one tectonic plate moving beneath another and sinking into the mantle at a convergent plate boundary. 

  • The action of being pushed or drawn beneath another object. 

  • Arithmetical subtraction. 

  • A surjection between diffeological spaces such that the target is identified as the pushforward of the source. 

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