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Noun: instancy  in-stun(t)-see
  1. The quickness of action or occurrence
    "the instancy of modern communication";
    - immediacy, immediateness, instantaneousness
  2. [archaic] The quality of being insistent
    "he pressed his demand with considerable instancy";
    - imperativeness

Derived forms: instancies

Type of: celerity [archaic], quickness, rapidity, rapidness, speediness, urgency