To any of those who do not see this as possible:
Many hallucinogens make you perceive time slower, in fact, 1 minute may feel like 10. Therefore, it sure is possible to even experience 1 minute as 100, 1000 or even 1 million. Though, nobody will probably reach this state, it’s still possible. Time is felt differently depending on the individual’s mind. 
Didn’t read it all so many replies 
but what about (i’m aware someone may have already posted this hear) like a watch/clock like writercubes but more adapted for people that haven’t been LDing for ever. Suchs as a watch that said once you entered a dream “Your dreaming become lucid” and let control the dream time waking time ratio!
just and idea but yet again where would we be without ides 