Bar-Sinister vs bar sinister

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. 

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