Timeline technicalities... I need help!

Ummmm, so, gurus of Star Wars, how much time would there be between the capture of the Tantive IV and the destruction of Alderaan? Is this actually established anywhere, or is there... some length of time one could reasonably assume?

It has suddenly become important for me to know this! Haha. And any thoughts or pointers would be vastly appreciated. Even just days vs weeks would be useful!