Assuming you mean to count the number of occurrences of the same value for different keys in a hash (%names in the example below)

...
my %name_count;
for my  $name (values %names){
   $name_count{$name}++;
}
for my $name (sort {$name_count{$a}<=>$name_count{$b}} keys %name_coun
+t){
  print "$name occurs $name_count{$name} times in the \%names hash\n";
}
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