When you change your Google account password, if you enter one of your previous password you will see a warning like "You can't set a previous password". That's

When you change your Google account password, if you enter one of your previous password you will see a warning like "You can't set a previous password". That's right, impossible to set one of the password your used in the past. And Facebook does the same. I've already seen "You tried to use an old password. It has been changed a few days ago.".