Regency is used to refer to the period in Britain at the beginning of the nineteenth century, and to the style of architecture, literature, and furniture that was popular at the time. ...a huge, six-bedroomed Regency house. ...the Regency period.
I've heard an average of about 12 years. Heredity and diet can make a big difference. I had a yellow lab who died pretty suddenly at 10, but I know someone with a lab that is 18 years old. My current black lab is a rescue, so I don't know his age.
With newer combinations HIV tests, able to detect both antibodies and antigens (of both HIV-1 and HIV-2 strains), that time has dropped dramatically. Today, a lab technician using this test can make an accurate reading in about 26 days on average.