bar sinister vs bar-sinister

bar sinister

noun
  • A state or characteristic which is dishonorable or shameful; a stigma. 

  • A bend sinister or baton sinister in a coat of arms. 

  • The state or characteristic of having been born out of wedlock; illegitimacy; bastardy. 

bar-sinister

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