Nielsen ratings of the commercial minutes in a program, averaged across live viewing plus three (C3) or seven (C7) days of playback. C3 has been the currency of US national television since 2007; C7 is used by networks that argue for more delayed-viewing credit.
Related terms
Cite this entry:
Agency Echelon. "C3 and C7." Agency Echelon Reference, reviewed September 2026. https://agencyechelon.com/reference/glossary/c3-and-c7/