[mpawelski]

In my experience, the long intervals can freak you out at the beginning. You might think that it's just stupid and not possible to have that long intervals ("I will remember that in 3 years!?").

But in practice long intervals are shortened when you answer wrong once or more, or when you mark the answer as "hard" when it actually takes time for you to recall a card.

For me FSRF really work well, sometimes I see cards that I feel are really showing quite often and when I check the card history it usually shows that I had some "again"/"hard" answers in some recent past, and because of that these intervals and not increasing that much.

Plus you can also always increase "desired retention" from default 90%. You will have shorter intervals, but it will of course increase number of the reviews too.

[watwut]

The big interval was something like 3-6 months. Mostly 3 months, but some had 6.

I just concluded I am better off without algorithm that assumes once I have seen a word on flashcard once, it is reasonable to see it next time in months.