generalize vs thresh out

generalize

verb
  • To derive or deduce (a general concept or principle) from particular facts. 

  • To speak in generalities, or in vague terms. 

  • To infer or induce from specific cases to more general cases or principles. 

  • To spread throughout the body and become systemic. 

thresh out

verb
  • To extract or remove by threshing. 

  • To thrash out. 

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