Thanks.. will do that..
pi@raspberrypi:~ $ ls -lh /var/log/pihole.log*
-rw-r--r-- 1 pihole pihole 56M Dec 3 17:42 /var/log/pihole.log
so... after a little more research..I have a number of iPhone's on my network. Some (4) are set to auto-update and are pending an iOS 13.2.3 upgrade/install. One is going to try and install "later tonight".
I wonder if the content caching URL's in my OP were from those devices looking for locally cached content on the _aaplcach_tcp.localdomain lookup's? idk.
@Bucking_Horn - If I get a repeat, I'll definitely look at using the regex blocking. Thanks