Logtop

Usage: tail something | logtop [OPTIONS]

   -s, --size=NUM         Number of log line to keep in memory
                          Defaults to : 10000
   -q, --quiet            Quiet, only display a top 10 at exit.
   -l, --line-by-line=NUM Print result line by line
                          in a machine friendly format,
                          NUM: quantity of result by line.
   -i, --interval=NUM     Interval between graphical updates,
                          in seconds. Defaults to 1.

 Line by line format is : [%d %f %s\t]*\n
   %d : Number of occurences
   %f : Frequency of apparition
   %s : String (Control chars replaced by dots.