| No | Category of writing problems | Frequencies of writing problems | Percentage (%) |
| 1 | Spelling | 489 | 23.04 |
| 2 | Tense | 396 | 18.66 |
| 3 | Subject-verb agreement | 305 | 14.37 |
| 4 | Punctuation | 218 | 10.27 |
| 5 | Fragment | 131 | 6.17 |
| 6 | Preposition | 129 | 6.07 |
| 7 | Number | 104 | 4.90 |
| 8 | Pronoun | 98 | 4.61 |
| 9 | Misuse of words/wordiness | 89 | 4.19 |
| 10 | Articles | 87 | 4.09 |
| 11 | Capitalization | 76 | 3.58 |
|
| Total | 2122 | 100 |