consolidation vs weakening

consolidation

noun
  • The combination of several actions into one. 

  • A solidification into a firm dense mass. It is usually applied to induration (swelling or hardening of normally soft tissue) of a normally aerated lung. 

  • The act or process of consolidating, making firm, or uniting; the state of being consolidated 

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 consolidation and weakening occurred in a corpus of books? (source: Google Ngram Viewer )