Use human-readable-duration if you want to replace "1002012 seconds left" by the easier to read: "11 days 14 hours 20 min 12s left"

But also if you want to manipulate time duration easily by using seconds, minutes, hours and days. Typically if you prefer to write:

x + (5 * oneSecond) + (2 * minute) + (1 * day)

instead of

x + 5 * 2*60 * 1*60*60*24

So here how you use it:

>>> humanReadableDuration 1002012.002
"11 days 14 hours 20 min 12s 2ms"

>>> humanReadableDuration $ (4 * hour) + (2 * minute) + (3 * ms)
"4 hours 2 min 3ms"

And one nice thing you could do:

>>> let duration1 = (4 * hour) + (2 * minute) + (3 * ms)
>>> let duration2 = (8 * hour) + (33 * minute) + (5 * oneSecond)
>>> humanReadableDuration (4 * duration1 + 2 * duration2)
"1 days 9 hours 14 min 10s 12ms"

Happy hacking.