blanc vs off-white

blanc

noun
  • A white cosmetic. 

  • A white sauce of fat, broth, and vegetables, used especially for braised meat. 

off-white

noun
  • A very pale colour that is almost white. 

adj
  • Of a very pale colour that is almost white. 

How often have the words blanc and off-white occurred in a corpus of books? (source: Google Ngram Viewer )