Two posts per week is the band most executives can sustain when the workflow is right. The workflow has to keep the executive's time under thirty minutes per post, including the edit. Above that threshold, executives miss weeks at a time. Below it, the cadence holds.
The thirty-minute ceiling is not arbitrary. It is the point at which thought leadership stops competing with the executive's primary job for attention. Marketers who treat that ceiling as a design constraint, not a problem to work around, build sustainable thought leader programmes.
The most common failure mode is front-loading the executive's time during setup and assuming it will compress naturally. It does not compress without a deliberate workflow. Build the workflow first, then launch the programme.