This question has been asked so many times! I’m sure it’ll be asked more even after I write this, but anyways…
Dream doesn’t need to write recommended listening time anymore because 95% of the time it’s the same thing, 2-3 times.
For the other 5% Dream makes sure to state you can use it as much as you need.
So if nothing is written in the description, you’re 100% safe to assume that you should stick to 2-3 times.