legislative vs legislative branch

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 

legislative branch

noun

  • The branch of government which is concerned with the making of laws 

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