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.

progression ‘course’

French

References: PH Morelon: I.9:1, 28:5
Translation of:
Arabic: مسير [PH Morelon: I.9:1, 29:4]
Synonyms:
mouvement[PH Morelon: I.1:5, 16:9; I.11:4, 38:16]