| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was a [noun] | 30831 |
|
| 2 | was a [noun sg] | 29853 |
|
| 3 | be a period | 232 |
|
| 4 | [be] a period | 232 |
|
| 5 | was [art] period | 147 |
|
| 6 | was [art] period | 147 |
|
| 7 | [was/were] a period | 123 |
|
| 8 | was a period | 108 |
|
| 9 | was a period | 108 |
|
