From "What Is Spot TV Advertising?" by Neil Kokemuller:
Spot TV advertising refers to the common advertising approach of buying 30 or 60 second ad placements on a particular station. Before an advertiser buys spots, it must produce one or more commercials. Then, the company or its ad agency buys a package of spots through a network or station.
Further (emphasis in the original):
The goal is to prepare a package of spots that appear during the times and on the shows that reach the intended audience.
Based on this, I would call what you see on TV in general the commercial—and call what happens each time it's shown "the airing or broadcast of the spot."
But a more commonly used and understood verb for such an instance—and a word used both in this article and in your own question—is appearance.
So, you could describe it as:
One appearance today and seven appearances in total this week.