Advertency, Advertence n. The act of adverting, of the quality of being advertent; attention; notice; regard; heedfulness. "To this difference it is right that advertence should be had in regulating taxation."
... wordes and tho wommanisshe thinges, She herde hem right as though she thennes were; 695 For, god it wot, hir herte on other thing is, Although the body sat among hem there. Hir advertence is alwey elles-where; For Troilus ful faste hir soule soughte; With-outen word, alwey ... — Troilus and Criseyde • Geoffrey Chaucer