PAL

Ptolemaeus Arabus et Latinus

_ (the underscore) is the placeholder for exactly one character.
% (the percent sign) is the placeholder for no, one or more than one character.
%% (two percent signs) is the placeholder for no, one or more than one character, but not for blank space (so that a search ends at word boundaries).

At the beginning and at the end, these placeholders are superfluous.

ἰσάριθμος‘equal in number’

Greek. – Grammar: adj.

References: PH Heiberg: I.5:4, 78:7
Translated into:
Arabic: مساوي لعدد [PH Morelon: I.5:4, 23:4]
Modern translations:
English: the same number… as the number [PH Hamm: I.5:4, 48:18-19]