Biphasic sleep?
Has anybody tried this?
https://www.sleepfoundation.org/how-sleep-works/biphasic-sleep#:~:text=Biphasic%20sleep%20is%20a%20sleep,as%20segmented%20or%20bimodal%20sleep.
https://www.sleepfoundation.org/how-sleep-works/biphasic-sleep#:~:text=Biphasic%20sleep%20is%20a%20sleep,as%20segmented%20or%20bimodal%20sleep.