> Earth's transit would be about 12 hours, Jupiter's transit around 29 hours …per year, for Earth; per ~12 years for Jupiter is I think what the GP was asking.

> Earth's transit would be about 12 hours, Jupiter's transit around 29 hours …per year, for Earth; per ~12 years for Jupiter is I think what the GP was asking. This is extremely dependent on the radii of the inner and outer limits of the the habitable zone for any given star, though, as well as the star’s mass.