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.

παραχώρησις‘recession’

Greek. – Grammar: n.

References: Alm. Heiberg: I.5, 18:5; II.6, 103:9; I.8, 28:8; I.12, 65:20
Translated into:
Arabic: ما عدّ [Alm. MS Leiden: f. 5v]
Arabic: حركة [Alm. MS Tunis: 22b.19]
Arabic: ميل [Alm. MS Leiden: f. 17r]
Arabic: تباعد [Alm. MS Tunis: ]