pottage vs stroganoff

pottage

noun
  • A thick soup or stew, made by boiling vegetables, grains, and sometimes meat or fish, a staple food throughout Europe in the Middle Ages. 

stroganoff

noun
  • A dish of sautéed pieces of beef (or a substitute) served in a sauce with sour cream. 

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