Main vs Sultan

Main

name
  • A river in Northern Ireland, flowing into Lough Neagh. 

  • A river in southern Germany, flowing from Bavaria to the Rhine. 

  • A surname. 

Sultan

name
  • A city and river in Washington 

  • A coastal town in Libya 

  • An unincorporated community in Ontario 

  • A surname. 

  • A glacier in Antarctica 

  • A village in Azerbaijan 

  • A town, village and mountain range in Turkey 

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