annex vs contenement

annex

noun
  • An addition or extension to a building. 

  • An appendix to a book or document. 

  • An addition to the territory of a country or state, from a neighbouring country or state, normally by military force. 

  • An addition, an extension. 

verb
  • To attach or connect, as a consequence, condition, etc. 

  • To join; to be united. 

  • To add something to another thing, especially territory; to incorporate. 

contenement

noun
  • That which is connected with a tenement, or thing holden, as a certain quantity of land adjacent to a dwelling, and necessary to the reputable enjoyment of the dwelling. 

  • That which is held together with another thing. 

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