open-door vs unconditional

open-door

unconditional

noun
  • That which is not conditional. 

  • A conditional-like structure expressing that the consequent holds true regardless of the particular value of the antecedent. 

adj
  • Absolute; without conditions, limitations, reservations or qualifications. 

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