Best way to narrow down where a simple account name is used (ex. AR)

Hello! 

We named an alternate hierarchy account parent AR and are now trying to find where that account was called/used because we want to remove it without impacting other things (we'll redirect wherever it's referenced to its replacement/new hierarchy). 

We use Finit's Toolkit/SearchIt (replaced by OS's ownership in more recent releases) but as you can imagine, searching "AR" gets 100s/1000s of matches. Is there a way folks might suggest to narrow down this search? A#AR has helped but I'm afraid we'll still miss areas where the A# isn't referenced in front of the account name. We also tried searching the member ID in SearchIt and that doesn't work. 

Any suggestions appreciated! Thanks!
-Nicole