redeem vs unlade

redeem

verb
  • To clear, release from debt or blame 

  • To recover ownership of something by buying it back. 

  • To set free by force. 

  • To save, rescue 

  • To repair, restore 

  • To liberate by payment of a ransom. 

  • To save from a state of sin (and from its consequences). 

  • To restore the honour, worth, or reputation of oneself or something. 

  • To reform, change (for the better) 

  • To expiate, atone (for) 

  • To convert (some bond or security) into cash 

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 redeem and unlade occurred in a corpus of books? (source: Google Ngram Viewer )