| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [adv] a [noun] | 6758 |
|
| 2 | [was/were] [adv] [art] period | 28 |
|
| 3 | [was/were] [adv] [art] period | 28 |
|
| 4 | [be] [adv] a period | 27 |
|
| 5 | [was/were] [adv] a period | 20 |
|
