How often has the US Supreme Court overturned legislation?

There is no specific frequency pattern to indicate how often the US Supreme Court overturns legislation. Some Courts, such as the one seated during President Franklin Roosevelt's first two terms of office, overturned quite a bit of legislation; other Courts have been more restrained.

According to the GPO (Government Printing Office Database) the US Supreme Court overturned 158 Acts of Congress between 1789-2002, the most recent year for which information is available.