amalgamation vs weakening

amalgamation

noun
  • The production of an alloy of mercury and another metal. 

  • The result of amalgamating; a mixture or alloy. 

  • The process of amalgamating; a mixture, merger or consolidation. 

weakening

noun
  • A structural principle of mathematical logic that states that the hypotheses of any derived fact may be freely extended with additional assumptions. 

  • An instance or process of loss of strength. 

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