... split only by every 6 time the delimiting factor occur. [emphasis added] 
>perl -wMstrict -le
"my $data = 'A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z';
 ;;
 my @ra = split m{ (?: , [^,]+){5} \K , }xms, $data;
 ;;
 printf qq{'$_'  } for @ra;
"
'A,B,C,D,E,F'  'G,H,I,J,K,L'  'M,N,O,P,Q,R'  'S,T,U,V,W,X'  'Y,Z'

[download]

Or, alternatively (didn't read this far before posting the first solution), ...

... split only after 5 comas. ... output should be ... like ... "A,B,C,D,E" "F,G,H,I,J" & so on [emphasis added] 
>perl -wMstrict -le
"my $data = 'A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z';
 ;;
 my @ra = split m{ (?: , [^,]+){4} \K , }xms, $data;
 ;;
 printf qq{'$_'  } for @ra;
"
'A,B,C,D,E'  'F,G,H,I,J'  'K,L,M,N,O'  'P,Q,R,S,T'  'U,V,W,X,Y'  'Z'

[download]

\K is available with Perl version 5.10+. See discussion of  \K in Look-Around Assertions (sub-section on "(?<=pattern)" "\K") in perlre.

In reply to Re: Seeking help with split! by AnomalousMonk
in thread Seeking help with split! by Anonymous Monk

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