I have a deck with inherently difficult learning materials and i want to limit the amount of new cards in this deck to one per week.
Currently I cannot do it, but if it was allowed to specify "0.14" in "New cards/day" in the Deck’s options, then it would mean 1 new card per week.
Suppose you have 10 such cards, you can set those cards due time 0-70, 70 is 7*10, so those 10 cards will be reviewed randomly in future 10 weeks.

Or you can set due date manually for each card.
Setting review date is not quite the same as setting the amount of new cards per day. The new cards stay new until I learn them and i can configure the new cards to appear after the review cards in a learning session. On the other hand, the review cards will appear in the review queue on their due day and mix with other review cards.
Also setting a review date far in the future without ever learning the card could mess the learning process. Suppose I set review date to 5 weeks ahead. Then, in five weeks i learned it and marked myself as “good”. That might set the next review several months futher in the future. But if that card was new and just learned it would set the next review date for tomorrow. Not quite the same.
Also I may have 10 such cards now, but I can add more in the future, so if I set due date manually for them I would need to remember the last due date I set and calculate the next due date each time I add a new card to this deck.
Maybe we can add a setting:
Sunday: _ cards
Monday: _ cards
…
Saturday: _ cards
So that we can fine tune cards number by every day per week.
In your case, we can set one day to 1, and others to 0.
BTW, I don’t think fractional new cards/day is a good idea, it’s still possible that you encounter several new cards in a row(though probability is low).
This is good idea, it is clearer for the users, than fractional card amount.
Another alternative would be the following setting:
One card per each __ days.
It will allow even setting 1 new card per month.
And set a start date? Anki won’t know when to start.
It would. It would count N days from the day the last new card was introduced to learning in this deck.
Yes please!! This would be an awesome setting to be implemented
I know this is an old thread, but it appears a number of people have asked over the years and it hasn’t been solved, only suggested as a feature.
I’d like to support the suggestion and offer a use case.
I’m studying Korean Hanja, very slowly (it’s not essential to my job, but being able to read them would open up more opportunities). I’ve learned around 1000 characters over the past 12 years, studying on and off with massive (years-long) breaks when I get too busy with work and research projects.
With current Anki functionality, I have to stop new cards when 1 per day becomes too heavy a burden given my workload. Manually scheduling cards more intermittently also obviously fails in this situation (the reason I use Anki in the first place is to offload scheduling). Once that happens, it can take months or years to regain the wherewithal to start studying again.
If I could’ve reduced the burden to 1 card every 3 days, or even 1 per week, over the past 12 years, I would still know a significantly larger number than I do now. And what about ten years from now? Slow and steady wins the race. I’d love to see this feature added.
You can use the Grade Now feature to introduce however many new cards you want in whatever order you wish (available as an addon for older anki versions)
This doesn’t seem to need additional functionality.
On the days you would like to introduce a New card, set your “Today only” New card limit to 1.
Or suspend your New cards, and on the days you would like to introduce a New card, unsuspend one.
Use the “Limit New by Young” add-on (it controls the workload):
Thanks for commenting this manual workaround. As a practical matter, this or custom study is what I’ve been doing. I’ll also consider the other add-ons in this thread. And I understand that the devs work mostly voluntarily and have to be economical about what functionality is added.
However, I’d like to note for future visitors to this thread and others like it that I don’t think this is a plausible solution. To reiterate, I use Anki to offload scheduling of study. Manual workarounds require me to think about scheduling and pacing every day.
I want an automated process that gives me a (fairly) precise idea of how much I will learn over time, even if I learn very slowly over a very long period.