In English, we frequently look at an acronym and name multiple repeated letters using an ordinal multiplier.
Automobile Association of America - AAA is read as Triple-A.
Abdominal Aortic Aneurysm - AAA is read as Triple-A
National Association for the Advancement of Colored People - NAACP is read as N Double-A CP
Aamco Transmission Repair - Read in their ad copy Double-A MCO
AAA or AA Battery - Triple-A or Double-A Battery respectively
Is there a phrase or word for this phenomenon?