I think it's illustrative to look at how long (as a percentage of the universe's age, 13.7 Ga) each of those steps has taken in our case: 1. 70%

I think it's illustrative to look at how long (as a percentage of the universe's age, 13.7 Ga) each of those steps has taken in our case: 1. 70% 2. 1–3% 3. 1–3% 4. 15% 5. and 6. 10% 7. 4% 8. 0.03%