federal vs unionized

federal

adj
  • Pertaining to a league or treaty; derived from an agreement or covenant between parties, especially between nations. 

  • Pertaining to the national government level in a federal nation, as opposed to state, provincial, county, city, or town. 

noun
  • A law-enforcement official of the FBI 

  • A unionist soldier in the American Civil War. 

  • A supporter of federation. 

unionized

adj
  • Organized into a trades union or trades unions. 

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