monograph vs monography

monograph

noun
  • A scholarly book or a treatise on a single subject or a group of related subjects, usually written by one person. 

verb
  • Of the FDA: to publish a standard that authorizes the use of (a substance). 

  • To write a monograph on (a subject). 

monography

noun
  • A monograph. 

  • Representation by lines without colour; an outline drawing. 

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