blackening vs shiner

blackening

noun
  • The act or process of turning (becoming) black in colour. 

  • Any of various (dark-colored) surface treatments for metal substrates, to inhibit corrosion; on steel, generally, synonym of bluing. 

  • The act of defaming or sullying. 

  • The result or an instance of such an act or process; a black stain or mark. 

shiner

noun
  • A black eye. 

  • Any silvery fish, such as the horsefish, menhaden, or moonfish. 

  • Raccoon eyes. 

  • One who shines; a luminary. 

  • Any of numerous species of small freshwater American cyprinoid fishes of Notropis, Lythrurus, and allied genera, such as the redfin. 

  • A small reflective surface used for cheating at card games. 

  • A bottle of finished wine, without a label. 

  • A moonshiner. 

  • One who causes things to shine; a polisher. 

  • The common silverfish, Lepisma. 

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