0.25 Albert H. Marckwardt J. G. Perrin J. B. McMillan, Current English Forum, College English, 1942.
| { grammar sentence grammatical sentences } | 0.25 |
| { words errors usage word } | 0.20 |
| { kind question problem point } | 0.11 |
| { rights national government political } | 0.06 |