Comment by watwut
It is not a human failing. A human who has huge amount of free time on Sunday, but comes home from work super tired on Monday did not failed anything. And from the other side, there wont be any difference between you revising a card after 89, 90 or even 95 days.
A human who had a lot of time to learn during January, because his job workload was easy is not failing anything if his job related workload becomes high in March and April. But, all that January effort will be punished by super high workloads in March and April in Anki.
Anki has a feature named Easy Days which allows you to spend less time on Anki on some days of the week.
Source: https://docs.ankiweb.net/deck-options.html?highlight=easy%20...