enough vs insufficient

enough

det
  • Sufficient; all that is required, needed, or appropriate. 

noun
  • An instance of being sufficient, or of doing something sufficiently. 

intj
  • Stop! Don't do that any more! 

pron
  • A sufficient or adequate number, amount, etc. 

adv
  • Used after certain adverbs to emphasise that a quality is notable, unexpected, etc. 

  • Fully; quite; used after adjectives to express slight augmentation of the positive degree, and sometimes equivalent to very. 

  • Sufficiently. 

insufficient

det
  • An inadequate quantity of; not enough. 

  • A quantity (of something) that is less than is needed. 

adj
  • Not sufficient; lacking competent power or ability; unqualified, unequal, unfit. 

  • Not sufficient; of a type or kind that does not suffice, that does not satisfy requirements or needs. 

How often have the words enough and insufficient occurred in a corpus of books? (source: Google Ngram Viewer )