rainborick - 3:23 pm on Aug 17, 2013 (gmt 0)
They don't explicitly say one way or the other, or even detail what they mean by the term "associate", but crossing a domain boundary with frames has traditionally been avoided by Google. Take the example in the first post in this thread: If the domain of the parent <frameset> page did not match the domain(s) used in the <frame> tags ("LINK TO REAL WEBSITE"), Google has not generally displayed the parent page in the SERPs as they otherwise might. That seems a reasonable practice, if for no other reason than to reduce content hijacking via frames. And I would be surprised if that tendency did not extend to "associate"-ing the content with the parent as well, but I can't explain what the OP saw in how the <frameset> site was performing.