approbative vs benign

approbative

adj
  • Expressing approval. 

  • Sanctioning officially, giving authorization or approval to something. 

noun
  • A word or grammatical form which denotes a positive affect expressing the appreciation or approval of the speaker. 

benign

adj
  • mild and favorable 

  • Not harmful to the environment. 

  • Kind; gentle; mild. 

  • Not posing any serious threat to health; not particularly aggressive or recurrent. 

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