David,
They are released two to four times a week.
I am at the studio for sure every Tuesday and Thursday. In between I often record lessons in the home studio as well. And every time a lesson is recorded it is edited, mixed down and then published.
For example, this week we published two new lessons yesterday and one was released today. After they are released we update our lesson index on the website at
www.project-management-prepcast.com/inde...uct/product/#Lessons
and on Sundays we send out the PMP Exam Tips newsletter to about 65,000 recipients, which includes a list of all the lessons that were released in the previous week.