I want to create a Google Analytics segment for our users who view at least a certain number of pages on our site. From what I can tell (please correct me if I'm wrong) this is easy to do if you don't care about what kind of page they view: you create a filter for the segment that checks to see if Unique Pageviews is greater than some value such as 4. However our site has a whole bunch of pages that I don't really care if someone reads (our "about page" for example). So what I'm trying to do is create a segment of how many people view at least X pages of what we call "Learning Content" (basically two specific page types on our site). How can I segment the users who read a certain amount of learning content?
Two types of pages fit into our definition of learning content. The first one has a URL matching a regex that sort of looks like /learning_content_1/.* and the second matches regex /learning_content_2/.*. I've already created a content group for learning content that correctly identifies these two content groups. However I wasn't able to find any way to filter a segment based on how many unique pageviews (or even just pageviews) come from a specific content grouping. Is this even possible? If not, how might I work around that?
The research I've done so far: Google Analytics: How to segment by many groups of pages was somewhat helpful but didn't address the question of how to create an actual GA segment based on pageview information for a content grouping or content group.

