νυχθήμερον G3574
nychthḗmeron · nookh-thay'-mer-on · Noun Neuter
from νύξ and ἡμέρα; a day-and-night, i.e. full day of twenty-four hours:--night and day.
1 Occurrence in the King James Bible
2 Corinthians 11:25Thrice was I beaten with rods, once was I stoned, thrice I suffered shipwreck, a night and a day I have been in the deep;