| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should be [vb pp] for [num] [noun] | 13 |
|
| 2 | should be [vb pp] for [num] [noun pl] | 10 |
|
| 3 | should be [vb pp] for [num] years | 6 |
|
| 4 | should be [vb pp] for [num] year | 6 |
|
