The Prince Says He Has Waited Two Thousand Years for Me

The Female Lead Is Incredibly Badass: Her Medical Skills, Martial Arts, and Background Are All Unmatched

I'm looking for books like Divine Doctor: The God of War Prince Behaves Himself and Accepts His Favor. The female lead is an assassin reborn in ancient times. The leads marry first and fall in love later, and eventually the male lead uncovers all the female lead's secret identities.