Related for Ketubot 122:13
במאי קמיפלגי מר סבר מידי דשכיח ממידי דשכיח ומר סבר מידי דהוא גרים לה ממידי דהוא גרים לה
On what principle do they differ? One is of the opinion that the usual [is to be inferred] from the usual, and the other is of the opinion that what a husband has caused should be derived from that which he has caused.
Tosefta Ketubot
One who vows from having sex with his wife, Beit Shammai say: [They can remain married] for 2 weeks, like the [period of impurity after the] birth of a female; Beit Hillel say: 1 week, like the birth of a male and like her menstrual period. More than that—he divorces her and pays the ketubah.
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