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Webster 1913 Edition

Noun.

The quality of being comprehensive; extensiveness of scope.

Compare the beauty and

comprehensiveness

of legends on ancient coins.

Addison.

Noun.

The quality of being comprehensive, or of including much extent; as the comprehensiveness of a view.

The quality of including much in a few words or narrow compass.

Compare the beauty and comprehensiveness of legends on ancient coins.

comprehensiveness ‎(uncountable)

The state of being comprehensive.
- 1971, Keith Thomas, Religion and the Decline of Magic, Folio Society 2012, p. 312:
  It was this comprehensiveness which made the art so compelling.
- 1992, Rudolf M. Schuster, The Hepaticae and Anthocerotae of North America: East of the Hundredth Meridian, volume V, page viii
  The supplementary bibliography (in Vol. VI) attests to the comprehensiveness of the effort.