Southerner vs southern

Southerner

noun
  • A resident of the American South, often specifically a white resident of the American South. 

  • Synonym of Confederate: a citizen of the Confederate States of America. 

southern

noun
  • Synonym of southerner 

adj
  • Of, facing, situated in, or related to the south. 

  • Of a wind: blowing from the south; southerly. 

  • Of or pertaining to a southern region, especially Southern Europe or the southern United States. 

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