| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [verb] [prep] a [adj] | 2381 |
|
| 2 | [verb] [prep] a [adj] period | 425 |
|
| 3 | been [verb] [prep] a period | 27 |
|
| 4 | been [verb] [prep] [adj] period | 15 |
|
