1: νυχθήμερον
(Strong's #3574 — Noun Neuter — nuchthemeros — nookh-thay'-mer-on )

an adjective denoting "lasting a night and a day" (from nux, "night," and hemera, "a day"), is used in 2—Corinthians 11:25 , in the neuter gender, as a noun, the object of the verb poieo, to do, lit., 'I have done a night-and-a-day.'