No, of course I didn't mean to show threads based on the most views last week. I meant what you said in the second part. However, I think there is no date for each thread. There is only (threadid) which I think can be used. So you can actually show the 10 most popular threads from the last 100 threads or 1000. I don't think you can do it based on time like week or so. I might be wrong though.