The NASCAR Nationwide Series is a stock car racing series owned and operated by the National Association of Stock Car Auto Racing. It is promoted as NASCAR’s “minor league” circuit, and is a proving ground for drivers who wish to step up to the organization’s “big leagues”; the Sprint Cup circuit. Nationwide Series races are frequently held in the same venue as, and a day prior to, the Sprint Cup race scheduled for that weekend, encouraging fans to attend both events.

The series was previously called the NASCAR Busch Series and the NASCAR Busch Grand National Series. In December 2006, NASCAR officials confirmed that Anheuser-Busch, parent company for Busch Beer, would not renew its sponsorship of NASCAR’s No. 2 series after the end of the 2007 Season. On October 3, 2007, it was announced Nationwide Insurance would become the title sponsor beginning with the 2008 season.

via Nationwide Series

2011 Nationwide Series Frequencies