| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [been] [vb pp] [prep] [num] | 581 |
|
| 2 | [been] [vb pp] [prep] [num] months | 71 |
|
| 3 | [vb -s] [vb pp] [prep] [num] months | 9 |
|
| 4 | [vb -s] [been] [vb pp] [num] months | 5 |
|
