- 28 words for every minute spent reading and making fleeting notes.
- 415 words for every well-formed, fully written out permanent note
- 500 words for every well-formed, fully written out and installed permanent note (includes work to install it in the box)
- 84 words for every cross link created from one note to another
- 140 words for every bibliographic card created
- 56 words for every index entry created
If you’re diligently working at any or all of the above, instead of measuring all the small pieces, you could just use a 28 word/minute measure for your zettelkasten-based work.
If you’re not a full time research-only academic (without a teaching load or other administrative obligations) and for fun want to measure your NaNoWriMo for non-fiction work on a card per day basis using Niklas Luhmann as a guide/measure, then you should do the reading, research and note taking work to produce 0.75 cards per day (that is, well written permanent notes installed, indexed, and well-linked; we’re not keeping track of the indexing cards, bibliographic cards, or other fleeting notes here, which you’ll also be doing along the way) to keep pace for an equivalent 50,000 words during the month. This is about 5.25 cards per week or about 23 cards for the entire month.
The goal here is, instead of churning out raw words, to churn out reading, research, and note making towards material you can reasonably use to write journal articles, book chapters, or a full non-fiction book.
If you’re using an index card-based system for fiction writing the way Vladimir Nabokov did, then you really should do a traditional word count as that’s more closely in line with the workflow of the standard NaNoWriMo work.
N.B. This probably overshoots the mark, as the 6 cards/day number for Luhmann probably includes all cards and not just permanent notes in his entire collection over his entire lifetime’s work. It also doesn’t take into account the possibility that he carried a teaching load, administrative work, fundraising work, or other nonsense required of professors.) Of course this is is all just for fun anyway, so… quit worrying and start researching and writing a little bit every day.