The difference between As a rule and Usually

When used as adverbs, as a rule means in general, whereas usually means most of the time.


check bellow for the other definitions of As a rule and Usually

  1. As a rule as an adverb (idiomatic):

    In general; most often.

    Examples:

    "We go fishing every Sunday as a rule, but today the lake is frozen."

  1. Usually as an adverb:

    Most of the time; less than always, but more than occasionally.

    Examples:

    "Except for one or two days a year, he usually walks to work."

  2. Usually as an adverb:

    Under normal conditions.