| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [vb pp] [prep] [num] months [conj] | 9 |
|
| 2 | [been] [vb pp] for [num] months [conj] | 9 |
|
| 3 | [been] [vb pp] [prep] [num] months [coord] | 5 |
|
