plonk vs unlade

plonk

verb
  • To set or toss (something) down carelessly. 

  • To sit down heavily and without ceremony. 

  • To automatically ignore a particular poster. 

noun
  • Cheap or inferior everyday wine. 

  • AC Plonk 

  • A female police constable. 

  • The sound of something solid landing. 

intj
  • The sound made by something solid landing. 

  • The supposed sound of adding a user to one's killfile. 

adv
  • Precisely and forcefully. 

unlade

verb
  • To disburden; take the burden from; relieve. 

  • To discharge a cargo; discharge a burden. 

  • To discharge the cargo from. 

  • To unload. 

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