Show files being accessed most in a short time period

Try inotifywatch.

From the man page:

% inotifywatch -v -e access -e modify -t 60 -r ~/.beagle
Establishing watches...
Setting up watch(es) on /home/rohan/.beagle
OK, /home/rohan/.beagle is now being watched.
Total of 302 watches.
Finished establishing watches, now collecting statistics.
Will listen for events for 60 seconds.
total  access  modify  filename
1436   1074    362     /home/rohan/.beagle/Indexes/FileSystemIndex/PrimaryIndex/
1323   1053    270     /home/rohan/.beagle/Indexes/FileSystemIndex/SecondaryIndex/
303    116     187     /home/rohan/.beagle/Indexes/KMailIndex/PrimaryIndex/
261    74      187     /home/rohan/.beagle/TextCache/
206    0       206     /home/rohan/.beagle/Log/
42     0       42      /home/rohan/.beagle/Indexes/FileSystemIndex/Locks/
18     6       12      /home/rohan/.beagle/Indexes/FileSystemIndex/
12     0       12      /home/rohan/.beagle/Indexes/KMailIndex/Locks/
3      0       3       /home/rohan/.beagle/TextCache/54/
3      0       3       /home/rohan/.beagle/TextCache/bc/
3      0       3       /home/rohan/.beagle/TextCache/20/
3      0       3       /home/rohan/.beagle/TextCache/62/
2      2       0       /home/rohan/.beagle/Indexes/KMailIndex/SecondaryIndex/