oatmeal vs toneless

oatmeal

adj
  • Of a light greyish brown colour, like that of oatmeal 

noun
  • A light greyish brown colour, like that of oatmeal. 

  • Meal made from rolled or round oats. 

  • A breakfast cereal made from rolled oats, cooked in milk and/or water. 

toneless

adj
  • Lacking tone or expression. 

  • Lacking vitality; listless. 

  • Lacking tone or pitch, have the neutral tone. 

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