| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] was [art] | 33409 |
|
| 2 | [noun sg] was [art] | 22638 |
|
| 3 | period be [art] | 127 |
|
| 4 | period [be] [art] | 127 |
|
| 5 | period [was/were] [art] | 79 |
|
| 6 | period was [art] | 71 |
|
