I'm pretty sure if I read the code I would understand this report better but I was not curious enough and unfortunately that means I'm pretty confused now.
It seems the data is sliced three ways:
* The Most Popular Messages - Based on the name it sounds like someone voted on them, but then the definition says they 'are the most prevalent' which sounds like they are just the most frequent ones. - So I look at the number of lines where they show up and the number one shows up in just 119 lines, while some way down it seems there are some that show up in hundreds of thousands of lines. So I'm lost. - It also does not help that the order of the Files and Lines column is reversed compared to all the other sections.
* Noisy Popular Messages / Functions - So here the definition says they 'show up at least in 1% of the collected reports', so it sounds like it's the messages/functions that impact the most reports. So it's most frequent per report count. - They are still sorted by Line count though. Shouldn't they be sorted some other way? - Is there a difference between a file and a report?
* The Top Ten Single Charts - These really look like they are the most frequent by line count (based on the line count). But I have some doubts.