affixture vs installation

affixture

noun
  • The act of affixing 

  • The condition of being affixed 

installation

noun
  • An act of installing. 

  • Something installed, especially the whole of a system of machines, apparatus, and accessories, when set up and arranged for practical working, as in electric lighting, transmission of power, etc. 

  • A work of installation art. 

  • A grouping of facilities that constitute a permanent military base. 

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