For most users, once a week should be sufficient. That may seem too long, but it should work as long as you are not running a workload that is creating and deleting tons of files (with content) at a high rate.
tmpfs on /var/run type tmpfs (rw,nosuid,nodev,noexec,relatime,mode=755)
tmpfs on /media type tmpfs (rw,nosuid,nodev,noexec,relatime,mode=755)
tmpfs on /var/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,mode=755)
tmpfs on /tmp type tmpfs (rw,relatime)
/dev/sda2 on / type btrfs (rw,noatime,nodiratime,ssd)