- 1876, Edward Savard, Inspector of Schools, in Statement of the public accounts of the province of Quebec and annual report of the auditor of the province, p. 219 (at Google Books):
- The pupils are wanting in regularity of attendance and there is an unsufficiency of books.
- 1907, Joseph Conrad, The Secret Agent, ch. 9:
- The unsufficiency and uncandidness of his answer became painfully apparent in the dead silence of the room.