annex vs assume

annex

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. 

noun
  • 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. 

  • An addition or extension to a building. 

assume

verb
  • To adopt a feigned quality or manner; to claim without right; to arrogate 

  • To receive, adopt (a person) 

  • To authenticate by means of belief; to surmise; to suppose to be true, especially without proof 

  • To take on a position, duty or form 

  • To adopt (an idea or cause) 

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