Four including Sunday night. Five on Sunday two weeks per year (including Sunday night). There are more games being played than years ago (which is why the Sunday Ticket count remains close to 15 years ago).
Back in the day you might have missed one of the three afternoon games due to a blackout protecting the in market team. Having only one afternoon game would be rare. Were the missing game on Sunday Ticket? If the blackout was due to protecting an in market team's broadcast one would probably get the out of market game. But if the blackout was to protect ticket sales would that game not be on Sunday Ticket?
Having lived in the NYC DMA back in those days, we were subjected to the rules for the Giants and Jets. One was home, meaning no game being televised against it, and the other away. That was all we got on many Sundays. The league always scheduled them to play at different time so back then it was 1:00 and 4:00.
A couple of side notes here to prove I'm really old
Way back in the pre-cable early 1970's all home games were blacked out. My dad put a big rotating antenna on the roof to pick up the Philly stations which would televise the Giants when the Eagles were home and blacked out. The picture was a bit "snowy" but very watchable. We felt like we were really beating the system.
Fast forward to 1990 when I got sick of depending on local broadcasts, I put a 10-foot dish in my backyard to expand my viewing options. That was a true eye-opener. Backhauls and wild feeds were a blast. Every football game on Sunday, too. Then came Sunday Ticket via C / Ku band for a few years before it all moved to Directv.