| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [verb] for two year | 30 |
|
| 2 | [been] [verb] for two year | 30 |
|
| 3 | [been] [verb] for two years | 29 |
|
| 4 | [been] [vb pp] for two year | 17 |
|
| 5 | [been] [v-ing] for two year | 13 |
|
