52 weeks in a year means 13 weeks is 1/4year. 4 weeks means 1/13 a year.
It's not a coincidence =)

Dear @abitcoinskeptic

I just realized that I never read and thanked you for this comment. Somehow I've skipped it. So ... late thx :)

May I ask you for little favour? I'm not sure if I did ask you about it already or not (hope I'm not repeating myself).

Could you please check out also my recent post if you have few min and share your thoughts on questions related to concept of "introducing steem blockchain to businesses":

Your feedback is always appreciated ;) And I will upvote most valuable comment with 100-200k SP coming from project.hope account.
Yours, Piotr