e/Segmented sleep

Information
has gloss	eng: Segmented sleep, divided sleep, bimodal sleep pattern and interrupted sleep are modern Western terms for a polyphasic or biphasic sleep pattern found in medieval and early modern Europe and many non-industrialised societies today, where the night's sleep is divided by one or more periods of wakefulness. This is particularly common in the winter.
lexicalization	eng: Segmented sleep
instance of	(noun) a daily cycle of activity observed in many living organisms circadian rhythm