Good advice from Kees. Also don't forget that it's not necessary to have a whole year's calendar of audits planned out. You can have an annual plan without actually specifying exactly what process etc you are going to audit all planned out over the year! That way, if you do encounter a process or customer issue, you don't HAVE to make a change and get everyone upset because you "changed your mind" about what to audit.
Also, this particular requirement is another way of saying what's already in the standard - "the audit programme shall be established based on status and importance". Not sure if who wrote the TS requirements understood this, but that's basically the same thing.