flushing vs ruddiness

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). 

ruddiness

noun
  • The property of being ruddy. 

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