pillage vs plunderage

pillage

noun

  • The spoils of war. 

  • The act of pillaging. 

verb

  • To loot or plunder by force, especially in time of war. 

plunderage

noun

  • The embezzlement of goods on shipboard. 

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