Split 4xxx bytes into 6 QR-Codes

[pke]

Could we add a function to split data into exactly n frames if possible?
Maybe its already possible (using the loops argument?) and I just don't see it.

[gre]

right now, with the "dataSize" parameter, you can approach the number of QR code but it's not going to be exact since there is a "header" in the data.
I don't think it's in scope of this library to guarantee a given number of QR codes, but i'm curious about the usecase and if we can find a solution.

[pke]

The use case is to encode a PKCS#8 into 6 QR codes to print in a PDF to have an offline copy of a private key (password protected of course).
The key is 43xx bytes long.