directional vs directive

directional

adj
  • Of or relating to guidance or help. 

  • Indicating direction. 

noun
  • Something that indicates direction, such as a vehicle's turn signal. 

directive

adj
  • That which directs; serving to direct, indicate, or guide. 

  • Relating to the directive case. 

noun
  • An instruction or guideline that indicates how to perform an action or reach a goal. 

  • A form of legislative act addressed to the member states. The directive binds the member state to reach certain objectives in their national legislation. 

  • The directive case. 

  • An authoritative decision from an official body, which may or may not have binding force. 

  • A construct in source code that indicates how it should be processed but is not necessarily part of the program to be run. 

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