| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [art] [adj] period [prep] | 13 |
|
| 2 | been [art] [adj] period [prep] | 10 |
|
| 3 | been a [adj] period [prep] | 9 |
|
| 4 | been [art] [adj] period of | 5 |
|
| 5 | been [art] [adj] period for | 5 |
|
| 6 | been [art] [adj] period of | 5 |
|
| 7 | been [art] [adj] period for | 5 |
|
