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 · 14

Facsimile

tum aequabiliter moveatur in proposito tempore partes 1° 30′, quales zodiacus habet 360.

Anno igitur primo a morte Alexandri Conditoris, primo die Thoth secundum Aegyptios in meridie Alexandriae. Sol ab eccentrici apogaeo in mundi consequentia distabat partibus 162 et sexagesimis 10′, at quae in corde