plethoric vs sky-high

plethoric

adj
  • Excessive, overabundant, rife; loosely, abundant, varied. 

  • Suffering from plethora; ruddy in complexion, congested or swollen with blood. 

sky-high

adj
  • excessive, exorbitant 

  • extremely tall 

How often have the words plethoric and sky-high occurred in a corpus of books? (source: Google Ngram Viewer )