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.

period ‘time’

English

References: Alm. Toomer: 39
Translation of:
Greek: χρόνος [Alm. Heiberg: I.1, 6:2; I.3, 12:2; I.5, 18:9; I.16, 85; I.16:234, 85:5. – PH Heiberg: I.3:1, 74:8]
Synonyms:
time[Alm. Toomer: 36]
time-degree[Alm. Toomer: 74]
time-degree[PH Hamm: I.3:1, 46:18]
time-interval[Alm. Toomer: 42]