/usr/share/aide/config/aide/aide.conf.d/31_aide_nscd is in aide-common 0.16~a2.git20130520-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | /var/cache/nscd/(passwd|group|services)$ VarFile
/@@{RUN}/nscd/(socket|nscd\.pid)$ VarFile
/@@{RUN}/nscd$ VarDirInode
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