as a rule
- (idiomatic) In general; most often.
We go fishing every Sunday as a rule, but today the lake is frozen.
1907, Robert William Chambers, chapter II, in The Younger Set (Project Gutenberg; EBook #14852), New York, N.Y.: D. Appleton & Company, published 1 February 2005 (Project Gutenberg version), OCLC 24962326:
- His forefathers had been, as a rule, professional men—physicians and lawyers; his grandfather died under the walls of Chapultepec Castle while twisting a tourniquet for a cursing dragoon; an uncle remained indefinitely at Malvern Hill; […].
in general; most often