flaring vs flushing

flaring

noun
  • The act of something that flares. 

  • The deliberate open-air burning of natural gas that is generated as a by-product of various petrochemical processes, especially oil extraction; gas flaring. 

flushing

noun
  • The act by which something is flushed. 

  • A surface formed of floating threads. 

  • A heavy, coarse cloth manufactured from shoddy. 

  • Rushing of blood to the skin's surface, especially on the face, as happens under various physiological circumstances (e.g., in embarrassment or stress or during menopause). 

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