Trains, trams and buses: how do you think to work more often? is entirely dependent on your location, of course, is what happens construction wise and where the wind blows. In theory, though, the answer can be found in the scenario.
Melbourne's transit blog made an interactive map, on which the most frequent trains, trams and city buses. FYI, there are 16 tram lines, which run at least every 10 minutes during the week at noon. There are 14 bus run, how often, and only four railway lines that reach it.
Check your the best routes here, thanks to Peter Parker with melbourneontransit.blogspot.com. There are cards for the other days on the blog.