Limiting the consecutive occurrence

[M@LIK]

OK I'll explain more, what I meant was two repeat instances total any where in the whole line, so in QVHHRIRA, the two Hs is one instance and the two Rs would be the second instance.

Oh I get you, that wasn't very easy to do.
No more than 2 instances of a duplicate character:

Code:

/\(.\).*\1.*\(.\).*\2.*\(.\).*\3/d
/\(.\).*\1.*\(.\).*\(.\).*\2.*\3/d
/\(.\).*\1.*\(.\).*\(.\).*\3.*\2/d
/\(.\).*\(.\).*\1.*\2.*\(.\).*\3/d
/\(.\).*\(.\).*\1.*\(.\).*\2.*\3/d
/\(.\).*\(.\).*\1.*\(.\).*\3.*\2/d
/\(.\).*\(.\).*\2.*\1.*\(.\).*\3/d
/\(.\).*\(.\).*\2.*\(.\).*\1.*\3/d
/\(.\).*\(.\).*\2.*\(.\).*\3.*\1/d
/\(.\).*\(.\).*\(.\).*\1.*\2.*\3/d
/\(.\).*\(.\).*\(.\).*\1.*\3.*\2/d
/\(.\).*\(.\).*\(.\).*\2.*\1.*\3/d
/\(.\).*\(.\).*\(.\).*\2.*\3.*\1/d
/\(.\).*\(.\).*\(.\).*\3.*\1.*\2/d
/\(.\).*\(.\).*\(.\).*\3.*\2.*\1/d

Yup all these, don't forget to remove the previous rule:

Code:

/\(.\).*\(.\).*\1.*\2/d
/\(.\).*\(.\).*\2.*\1/d