SRS Time Intervals (v67.0)

[rfindley]

Radicals, Kanji, and Vocab all have the same intervals after level 2.

4h
8h
23h   (1d - 1h)
47h   (2d - 1h)
167h  (1w - 1h)
335h  (2w - 1h)
719h  (1m - 1h)  where 1m == 30d
2879h (4m - 1h)