NFL is an extreme example but I always found the comparison interesting.
How many breaks this works out to varies by show, since they try to cut it at strategic points. Usually 2-4 per 30 minutes.
If anyone has actual data on this I'd love to see it. Especially historical data.
Other ways television advertising has increased over time:
Number of ad breaks. In the 1950s and early 1960s ads were aired before and after shows, often with the host of the show doing the ad reads for one or two products that were billed as the show's "sponsors". A break for ads in the middle of the content was added in the mid-1960s, and the number of breaks per hour increased at least into the 1990s. https://ibuzzle.com/television-advertising-history
Number of ads per break. Television ads have gotten generally shorter over time. 30 seconds became the norm during the 1970s. From 2009 to 2019, the percentage of ads that were 15 seconds long increased from 35% to 42% (https://time.com/96303/tv-commercials-increasing/).
Amount of paid product placement inside the shows. In 2009, product placement occupied between 5.5 minutes and 19.25 minutes per hour, with unscripted shows the highest (https://www.marketingcharts.com/television-9434). Spending on television product placement has increased since then (https://www.marketingcharts.com/cross-media-and-traditional/...).
Addition of advertising to previously ad-free platforms. I recall that most cable networks originally did not air ads but cannot find the data to back that up. In 2021-2022, streaming services have increasingly added ads: https://www.marketingcharts.com/television/tv-advertising-22... In a 2022 survey, 41% of American TV-watching adults felt there were too many ads on television vs. 18-25% for various streaming platforms (https://hubresearchllc.com/reports/?category=2022&title=2022...).
There was service years ago--maybe it's still around--from one of the TV networks that would cut a whole game into 15-20 minutes, mostly be not showing any ads during the game, and cutting out all of the commentary/standing around.
The NFL GamePass service that you can subscribe to (how I mostly watch the NFL from outside the US) offers 'Game in 40 minutes' (sometimes called Condensed). It just cuts from play-to-play-to-play. It's a great way to be able to watch a couple of other NFL games in a given week (fits nicely into a lunch break), but I do actually miss the proper commentary. Good commentary teams are very helpful in breaking down what happened in the blur of action that is each play.
[0] https://www.channel4.com/corporate/about-4/what-we-do/channe...
https://www.channel4.com/corporate/about-4/operating-respons...
There's been a fair bit of misunderstanding around Channel 4 since Nadine Dorris (ex Secretary of State for Digital, Culture, Media and Sport) aanounced plans to sell off Channel 4. A lot of people never reaslised it was publicly owned and then assumed it was the same model as the BBC, but with some adverts.