mansion vs offshoot

mansion

noun
  • An astrological house; a station of the moon. 

  • An apartment building. 

  • One of twenty-eight sections of the sky. 

  • An individual habitation or apartment within a large house or group of buildings. (Now chiefly in allusion to John 14:2.) 

  • Any of the branches of the Rastafari movement. 

  • A large house or building, usually built for the wealthy. 

  • A luxurious flat (apartment). 

offshoot

noun
  • That which develops from something else. 

  • That which shoots off or separates from a main stem or branch of a plant. 

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