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.

distance ‘distance’

English

References: Alm. Toomer: 38; 39
Translation of:
Greek: ἀπόστημα [Alm. Heiberg: I.2, 9:22-23]
Greek: διάστημα [Alm. Heiberg: I.3, 12:24]