ameliorative vs what the doctor ordered

ameliorative

noun
  • That which betters or improves. 

  • A linguistic unit (such as a word, morpheme) that implies a positive or approving evaluation. 

adj
  • Of or relating to conceptual engineering, the normative study of which conceptual demarcation is most conducive to solve the problems the concept is a priori taken to solve. 

  • Suggesting or relating to a positive or approving evaluation. 

  • Able to repair or ameliorate. 

what the doctor ordered

noun
  • Exactly what is necessary or useful in a given situation; something very beneficial or desirable. 

How often have the words ameliorative and what the doctor ordered occurred in a corpus of books? (source: Google Ngram Viewer )