fraction slash vs strikethrough

fraction slash

noun
  • The slash variant ⟨⁄⟩ used for expressing fractions. 

strikethrough

noun
  • A horizontal or oblique line striking out individual characters. 

  • An overlaid horizontal line striking out other characters. 

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