codification vs legislation

codification

noun
  • The process of precisely formulating a statement, such as a code of laws. 

  • The act or result of arranging something into a code; the act of setting down a body of knowledge in a systematic way. 

legislation

noun
  • The act of legislating; preparation and enactment of laws. 

  • Law which has been enacted by legislature or other governing body 

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