unconditional vs with grain of salt

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. 

with grain of salt

How often have the words unconditional and with grain of salt occurred in a corpus of books? (source: Google Ngram Viewer )