PostEaseThere is no fixed number that applies to every account
How often to post depends more on whether each post is worth someone's attention than on hitting a specific count per day. A single genuinely interesting post beats several forgettable ones, especially on a platform where reply-driven conversation is such a large part of what the ranking rewards.
What tends to work in practice
Accounts that treat Threads as a running, semi-casual conversation, posting a few short things across a day when there is something worth saying, do better than accounts that batch everything into one dense post and go quiet. The format rewards showing up like a person having a day rather than a brand publishing a single daily update.
Watch reply engagement, not just post count
If a given posting frequency is producing genuine replies and conversation, it is working. If increasing frequency starts producing more posts but not more engagement, that is a signal to slow down and focus on what each post is saying.