Who generates the daily, weekly, monthly reports on FreeBSD?

[Anthony Atkielski]

Speaking of reports, how do the daily, monthly, and weekly reports
output by FreeBSD get generated?  I see nothing when I do a crontab -l
from root, but there's stuff under /etc/crontab.  Is there a schedule of
cron stuff that gets run independently of any user, or how does it work?
If I wanted to change when or how these reports are generated (I don't
currently, but suppose I did), where would I go to modify it, since it
doesn't seem to be part of root's crontab?

-- 
Anthony