leakage vs secretion

leakage

noun
  • An act of leaking, or something that leaks. 

  • The situation where sound is picked up by a microphone from a source other than that which is intended. 

  • The loss of revenue generated by tourism to the economies of other countries. 

  • The amount lost due to a leak. 

  • Loss of retail stock, especially due to theft. 

  • An undesirable flow of electric current through insulation. 

secretion

noun
  • the act of hiding something 

  • any substance that is secreted by an organism 

  • the act of secreting a substance, especially from a gland 

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