nihtes
This might be just a supplemental entry adding to an entry in the Main Volume.
Related §§ in Wright's OE Grammar:
In the OE text, the length is:indicated by acute accentsindicated by macronsnot indicated.
nihtes
Add:I. alone Hé nihtes on ungearwe hî on bestæl, Ors. 1,10; S. 46, 34. Hié . . . hié nihtes on frumslǽpe on bestǽlan, 2, 8 ; S. 92, 1: Chr. 876 ; P. 74, 11. II. with dæges, continuously Dæges and niehtes hié fundiað, Past. 127, 20. Þá hét Pompeius þæt mon þæt fæsten on fuhte dæges and nihtes, simle án legie æfter óþerre unwérig, Ors. 5, 11; S. 238, 9. Hit hagolade seofon niht dæges and nihtes, 5, 10; S. 234, 6. Ægþer ge dæges and nihtes, Bt. 35, 6 ; F. 168, 8.
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.