USA Today with a WOW figure:

An exclusive USA TODAY analysis of legal filings across the United States finds that the presumptive Republican presidential nominee and his businesses have been involved in at least 3,500 legal actions in federal and state courts during the past three decades. They range from skirmishes with casino patrons to million-dollar real estate suits to personal defamation lawsuits.

The sheer volume of lawsuits is unprecedented for a presidential nominee. No candidate of a major party has had anything approaching the number of Trump’s courtroom entanglements.