habit vs notion

habit

noun
  • An addiction. 

  • A long piece of clothing worn by monks and nuns. 

  • An action performed on a regular basis. 

  • An action performed repeatedly and automatically, usually without awareness. 

  • A piece of clothing worn for a specific activity; a uniform. 

verb
  • To clothe. 

notion

noun
  • Inclination; intention; disposition. 

  • Mental apprehension of whatever may be known, thought, or imagined; idea, concept. 

  • A sentiment; an opinion. 

  • An invention; an ingenious device; a knickknack. 

  • Any small article used in sewing and haberdashery, either for attachment to garments or as a tool, such as a button, zipper, or thimble. 

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