legislature vs lower chamber

legislature

noun
  • The legislative assembly of a province or territory, as opposed to the federal parliament. 

  • A governmental body with the power to make, amend and repeal laws. 

  • A legislative building. 

lower chamber

noun
  • The lower legislative chamber in a bicameral legislature; in many cases, the one that is directly elected and/or has more practical power, such as the power to raise and spend money. 

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