Dr Seiler and Dylan Johnson for example make it clear that polarized will always have some moderate work (zone 2 of 3 zone model) as well. It will never be pure polairzed.
If you want to take polarization to the extreme and quickly tweak to match your definition of polarized (because the definition has some flexibility). You can see below an example of polarized. Seilers pure definiton means 5 rides a week and 4 of them are easy. A lot of people prefer time in zone and Dr Seiler points out that is likely to be closer to 90/10.
These zone 2 rides are about 60% so pretty much guaranteed to be easy for everyone. You can boost ride feel to get closer to your own maximum zone 1. The best defition of easy is below AeT but for most that’s keeping it under 65-70%.
You can see with these settings. Your easy is easy.
In the final of this 12 week plan it is only about 12 minutes of hard so using ~90/10, so this would support up to about 2-3 hours a week of training. If you want to increase the ratio of hard for a longer duration plan just increase the intensity slider or add another day with some more hard intervals.
There is a lot of flexibility here. 80/20 or 90/10 is a very rough estimate. It does not need to be exact at all. The point is do more easy and make sure your hard is hard, or in coach jacks case you slowly build up your hard.
See below a 5 day a week plan, looking at time in zone this is probably closer to 90/10, with intensity level 3 and 2 vot max workouts a week or one, vo2 max and one hiit for example.