Federal vs parliamentary

Federal

noun
  • A member of a Federal Party 

parliamentary

noun
  • A parliamentary train. 

adj
  • Of a class of train which, by an act of parliament, ran both ways along a line, at least once each day, at the rate of one penny per mile. 

  • Of, relating to, or enacted by a parliament 

  • Having the supreme executive and legislative power resting with a cabinet of ministers chosen from, and responsible to a parliament. 

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