indubious vs unsupported

indubious

adj
  • Not doubting; unsuspecting. 

  • Not dubious or doubtful; certain. 

unsupported

adj
  • For which support or help is not available. 

  • Without confirmation from a credible source, without verifying support 

  • Without physical support. 

  • Not supported by or borne out of evidence or facts. 

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