throwback vs throwout

throwback

noun
  • Coordinate terms: nowhere income, throwout 

  • A reversion to an earlier stage of development. 

  • An atavism. 

  • An organism that has characteristics of a more primitive form. 

  • A person considered to be primitive, uncivilized and mentally deficient. 

  • A person or thing that evokes memories. 

  • A practice to avoid untaxed nowhere income by instead taxing such income in the originating state for a given transaction. 

  • A person similar to an ancestor, or something new similar to what already existed. 

throwout

noun
  • Coordinate terms: nowhere income, throwback 

  • A practice to avoid untaxed nowhere income by instead assuming the untaxed transaction is taxed in the originating state in a notional proportion to other taxable transactions. 

  • A folded sheet that opens out to one side; half a gatefold. 

  • One who has been rejected by society; an outcast. 

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