Strong’s Greek
G3574 — nuchthemeron
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
νυχθήμερον
nuchthemeron — pronounced nookh-thay'-mer-on
from 3571 and 2250; a day-and-night, i.e. full day of twenty-four hours:--night and day. see GREEK for 3571 see GREEK for 2250
1 occurrence in the KJV.
2 Corinthians 11:25
Thrice was I beaten with rods, once was I stoned, thrice I suffered shipwreck, a night and a day I have been in the deep;