Question about time period of GitHub Referring Sites

I have an open source project hosted at https://github.com/zinggAI/zingg/.

In the traffic section of a repository, I see the referring sites and the number of views and unique visitors. I am curious if this data is for 14 days like the git clones or visitors or is there some other time frame here? I could not find anything in the documentation that talks about this. Can someone please let me know ?