detour vs footnote

detour

noun
  • The diversion of the flow of execution for debugging or similar purposes. 

  • A diversion or deviation from one's original route. 

verb
  • To make a detour. 

  • To direct or send on a detour. 

footnote

verb
  • To add footnotes to a text. 

noun
  • An event of lesser importance than some larger event to which it is related. 

  • A qualification to the import of something. 

  • A short piece of text, often numbered, placed at the bottom of a printed page, that adds a comment, citation, reference etc, to a designated part of the main text. 

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