"三嫁難休" is a phrase that refers to the belief in Chinese astrology that certain indicators in a person's birth chart may suggest a higher likelihood of multiple marriages. According to the provided search results, there are several factors that may indicate a higher chance of multiple marriages for women. These factors include having a birth chart with a strong presence of official stars (官星) or a lack of controlling elements for the harm officer (傷官) star. Additionally, if the woman's birth chart shows a weak or absent official star (正官) or if the husband's star is repeated or affected by other negative influences, it may also suggest a higher likelihood of multiple marriages. However, it is important to note that astrology is not a scientifically proven method for predicting marital outcomes, and individual experiences may vary.