What do you make of this?

http://www.9types.com/writeup/enneagram_marriages.html

Specifically, it says that marriages between a 4 female and a 9 male were the second most common from the sampling (and not necessarily the most successful, just the most common). When relating this to socionics, what types would those be? Would 4 be INFp? What are possible socionics correlations to the Enneagram 9?

I'm trying to figure out what could be the socionics intertype relationship between an enneagram 4 and 9. And I thought it was interesting also that it was more common for the 4 to be female and the 9 to be male.