habit vs snap fastener

habit

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

  • 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. 

  • An addiction. 

verb
  • To clothe. 

snap fastener

noun
  • a pair of male/female interlocking disks used to fasten a piece of clothing in place of buttons 

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