PostEaseThe direct answer
Posting cadence is the rhythm an account posts on: 3 times a week, daily, twice a month, regular enough to describe as a pattern rather than a random frequency. "Cadence" implies regularity, not an average. Posting 8 times one week and zero the next produces the same average as 4 times a week, every week, but a very different cadence.
Why regularity matters more than the specific number
There is no universally correct cadence. What matters is that whatever frequency you choose happens consistently. An audience that learns roughly when to expect new content, even at a modest frequency, tends to build a stronger habit of checking back than one facing an unpredictable, bursty pattern.
A sustainable cadence beats an ambitious one that collapses
Committing to a frequency that cannot be sustained for more than a few weeks does more damage than choosing a lower, realistic one from the start. An account that goes quiet after a burst of daily posting reads worse than one that steadily posted twice a week the whole time.