Using a tacho card in slot 2 doing multi drop

It does say I can do a print out and Mark it down on the graph on the back I no it’s not the best way to do it because it only goes by 15 minuite intervals or I could do a manual entry for the entire day and put it down as work poa or break my self seems like a bit of a mind field to me tbh but what I’m aski g is what would be the best way to do this so I won’t get in trouble for it