legislative vs upper chamber

legislative

noun

  • That branch of government which is responsible for making, or having the power to make, a law or laws. 

adj

  • Making, or having the power to make, a law or laws; lawmaking 

upper chamber

noun

  • The upper legislative chamber in a bicameral legislature; usually smaller and having more restricted power than the lower chamber. 

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