semolina vs white flour

semolina

noun
  • Coarse grains produced at an intermediate stage of wheat flour milling. 

  • Such grains, usually from durum wheat, used in the preparation of pasta, couscous and various sweet dishes. 

white flour

noun
  • Refined flour made solely of the endosperm of wheat, i.e. with most of the germ and bran removed through the milling process, often chemically whitened. 

  • exact synonym of flour 

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