Óska-stund

As defined by the Cleasby & Vigfusson Old Norse to English dictionary:

óska-stund

f. the ‘wish-hour,’ for in the popular belief there is a point of time as short as the twinkling of an eye, recurring, some say, every day, others every week, or every year; and whatsoever one wishes at that moment comes to pass: hence the phrase, þú hefir hitt óskastundina, thou hast hit on the ‘wish-hour,’ when a person has a piece of luck. Akin to this is the legend of three wishes granted to one by some good fairy; hence the phrase, eiga sér ósk, to own a wish; eina vildi eg eiga mér óskina svó góða, a ditty, Maurer’s Volksagen.

Possible runic inscription in Younger Futhark:ᚢᛋᚴᛅ-ᛋᛏᚢᚾᛏ
Younger Futhark runes were used from 8th to 12th centuries in Scandinavia and their overseas settlements