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With sort $file | uniq -c, it's possible to sum up files/input and show the number occurences like that:

 13     foo
  1     bar

To get a better grasp of this data, I'd like to see them graphically like git does when showing changes (++++++++--):

------------ foo
-            bar
------       baz
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up vote 2 down vote accepted

A little search gave me that, which works beautifully, just adapt the name of your input file:

uniq -c YOURFILE|awk '{print $2}'|sort|uniq -c|sort -rn|head -20|awk '!max{max=$1;}{r="";i=s=60*$1/max;while(i-->0)r=r"#";printf "%15s %5d %s %s",$2,$1,r,"\n";}'
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