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.

Isaac Argyros, 〈Paraphrasis in Anonymum commentum in Quadripartitum〉

Madrid, UC-BH, cod. 122 · 10r

Primum enim considerare oportet quod ea etiam que necessario eventura sunt, si inexpectata provenerint ~~terrores ingerunt~~perturbationes stuporem afferentes et gaudia mentem alienantia maxime nata sunt facere, precognoscere autem illa, assuefacit et