plethora vs ug

plethora

noun
  • An excessive amount or number; an abundance. 

  • Excess of blood in the skin, especially in the face and especially chronically. 

ug

noun
  • The pectoral fin of a fish. 

  • A surfeit. 

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