plaintiff vs supplicant

plaintiff

noun
  • A party bringing a suit in civil law against a defendant; accuser. 

supplicant

noun
  • one who comes to humbly ask or petition 

  • A device attempting to authenticate itself to an 802.11 network. 

adj
  • begging, pleading, supplicating 

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