airdrop vs disburden

airdrop

verb
  • To delivery goods, equipment, or personnel by dropping them from an aircraft in flight. 

noun
  • The act of delivering goods, equipment, or personnel by dropping them from an aircraft in flight. 

  • The distribution of free tokens to help bootstrap a new cryptocurrency. 

disburden

verb
  • To rid of a burden; to free from a load carried; to unload. 

  • To free from a source of mental trouble. 

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