irresolute vs undetermined

irresolute

adj
  • Undecided or unsure how to act. 

  • Indecisive or lacking in resolution. 

undetermined

adj
  • Not determined; not settled; not decided. 

  • Not limited; not defined; indeterminate. 

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