@clacke That is probably close enough. By the time television rolled out, there were already multiple networks of radio broadcasters, so I think TV started out with networks being a part of the experience. There were limits on how many stations any one entity could own, so most stations were independently owned, even if they joined a network.

In late 1960s through 1970s Los Angeles, there were 3 main network TV stations, plus several independent stations. I don't think all 14+ stations* operated in the same time periods.

* 3 were public broadcast stations, including one owned by LA City Schools / LAUSD.