bar line vs oblique

bar line

noun
  • A vertical line in musical notation used to separate two bars or measures. 

  • Synonym of crossline (“type of headline”) 

oblique

noun
  • An oblique line. 

  • Synonym of slash ⟨/⟩. 

  • The oblique case. 

verb
  • To deviate from a perpendicular line; to become askew; 

  • To slant (text, etc.) at an angle. 

  • To march in a direction oblique to the line of the column or platoon; — formerly accomplished by oblique steps, now by direct steps, the men half-facing either to the right or left. 

adj
  • Having the base of the blade asymmetrical, with one side lower than the other. 

  • Disingenuous; underhand; morally corrupt. 

  • Not direct in descent; not following the line of father and son; collateral. 

  • Pertaining to the oblique case (non-nominative). 

  • Not erect or perpendicular; not parallel to, or at right angles from, the base. 

  • Growing at an angle that is neither vertical nor horizontal. 

  • Indirect; employing the actual words of the speaker but as related by a third person, having the first person in pronoun and verb converted into the third person and adverbs of present time into the past, etc. 

  • Not straightforward; obscure or confusing. 

  • Employing oblique motion, motion or progression in which one part (voice) stays on the same note while another ascends or descends. 

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