matter of course

noun3

1. •
   An occurrence that is expected, usual, or taken for granted in a given situation (see Usage notes below).
2. •
   An outcome or course of events regarded as natural, logical, obvious, or inevitable.

   • York might have known, and very likely did know, how that rein harassed me; but I suppose he took it as a matter of course that could not be helped; at any rate nothing was done to relieve me. — 1877
3. •
   Proper or common practice.

   • On some occasions standing ovations may be given to political leaders as a matter of course, rather than as a special honour.