Maseches Kesuvos 2a begins with:
בתולה נשאת ליום הרביעי ואלמנה ליום החמישי
A virgin is married on Wednesday and a widow on Thursday.
The ensuing dafim tell us the reasons why these days were specifically singled out (ex: in case husband has a *ta'anas b'sulim, shakdu, the day that fish were created etc)
Why isn't a divorced woman (or even yevamah) mentioned in this Mishnah as well?