numbering on [Date Changed] non intuitive

Nope, the numbering on [Date Changed] in WWWOFFLE Cache Index has got
to go (and be rewritten), as it is non intuitive:

$ lynx -width=555 -dump -nolist \
http://localhost:8080/index/http/groups.google.com.tw?sort=dated|
perl -wne 'next if 1../Pages$/;s/^\s+(\*|\d+|_).*/$1/s&&print'|
perl -pwe 's/\*+/\*/g'|fold|head -4
_*____*_6_*_*____*_*_*_*_8_*____*__*_6_*_*_7_*_*___*_*__*_*__*___*___*_*__*___*_
5_*___*_*_*_11_*___*_*_11_*_*__*_*_*__*_*__*__*__*_5_*_5_*_*____*_*_8_*____*_*_7
_*__*__*__*____*_*_*_*__*_*___*_5_*_*_*__*_*_*_*__*___*___*__*__*_*_*___*_*_*___
*_*____*___*___*_*___*_*___*___*_5_*___*_*_*_*_*__*___*_*____*_8_*_*__*_7_*___*_

Maybe it was just my bad luck, but there was 6 bars, then a "6 Days",
about 8 bars, then an "8 Days" [oh, these are intervals, not
cumulative, grrr, but ok, I guess, I say to myself], about 6 bars,
then "6 days", then 3 bars and "7 days". Whereupon I say to myself
that these are neither cumulative nor intervals, but something Andrew
already explained to me 3 times in email (but I'm too lazy to look up
again), or perhaps is documented, but is never makes sense if you look
at it without reading up on what it represents.

It must be something smart, worthy of also being used in [Modification
Time], [Access Time], but not before being rewacked into something
fathomable, or with a line of explanation at top each time!