[NTLUG:Discuss] disk usage by file age

[Michael Barnes]

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