Definitions of sufficiency:

• noun:   the quality of being sufficient for the end in view

  Example: "He questioned the sufficiency of human intelligence"

• noun:   sufficient resources to provide comfort and meet obligations

  Example: "Her father questioned the young suitor's sufficiency"

• noun:   an adequate quantity; a quantity that is large enough to achieve a purpose

  Example: "There is more than a sufficiency of lawyers in this country"