mixing vs reinforcement

mixing

noun
  • The act, or the result of making a mixture. 

adj
  • Of a stochastic process, to be asymptotically independent (in a precise mathematical sense). 

reinforcement

noun
  • The act, process, or state of reinforcing or being reinforced. 

  • The process whereby a behavior with desirable consequences comes to be repeated. 

  • A small round white sticker placed around a punched hole in a piece of paper to prevent the binder's rings from tearing through the paper. 

  • Additional troops or materiel sent to support a military action. 

  • A thing that reinforces. 

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