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.

Ptolemy, De planetarum hypothesibus liber (tr. John Bainbridge)

London, Guilielmus Jones, 1620 · 38

Facsimile

positum, in mundi consequentia et circa diametrum dictam excessu, quo Solis motus utrumque et inerrantium et stellae aequali tempore motum excedit, ut in annis Aegyptiacis 213 et nycthemeris primis integris 238, restitutiones 18 proxime compleat. Desunt enim ad accuratum calculum partis unius sexagesimae 0′ 10′′.