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disk usage by file age

I'm trying to figure out how to gather some disk data. What I need is
to find the disk usage by subfolder, but only by files older than a
certain time. I can get a list of files with
find ./ftp/news +mtime 180
and get a list of everything older than six months.
I can do
du -sh ./ftp/news/*
and find the usage by subfolder.
What I need is to combine the two, so I get something like

15M ftp/news/4-Dallas
40M ftp/news/4-Washington
560M ftp/news/House
1.1G ftp/news/Senate
717M ftp/news/White House
69M ftp/news/YIR 2009
65M ftp/news/stuff

knowing that the size is for files over six months old.

Any simple ideas for this?

Thanks,
Michael

Does this give you what you want?

Code:

find ./ftp/news +mtime 180 -exec du -sh {} \;

Not sure if I'm understanding you well enough to give a proper answer.

HTH

Forrest