Chords on bass are not common at all. If u know how to play a guitar, it is very easy to pick up bass. Bass is normally just the base notes of the chords played by the rythm guitar, though people like Flea(RHCP) reinvented bass, by using it as a lead instrument. Bass is normally just singular notes. But there are certain songs where two to three string power chords are played on bass. An example for this would be Sober by Tool. Check out this tab, it should help.
Overwhelmed as one would be, placed in my position
Such a heavy burden now to be the one
Born to bear and read you all the details of our ending
To write it down for all the world to see
But I forgot my pen, Shit the bed again...