depreciation vs reflux

depreciation

noun
  • The decline in value of assets. 

  • The state of being depreciated; disparagement. 

  • The measurement of the decline in value of assets. Not to be confused with impairment, which is the measurement of the unplanned, extraordinary decline in value of assets. 

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. 

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