reflux vs shrinkage

reflux

verb
  • To boil a liquid in a vessel having a reflux condenser 

  • To flow back or return. 

noun
  • A technique, using a reflux condenser, allowing one to boil the contents of a vessel over an extended period. 

  • The backwards flow of any fluid. 

  • The leaking of stomach acid up into the oesophagus. 

shrinkage

noun
  • The act of shrinking, or the proportion by which something shrinks. 

  • The reduction in size of the male genitalia when cold, such as from immersion in cold water. 

  • The loss of merchandise through theft, spoilage, and obsolescence. 

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