| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [adv] a [noun] | 20189 |
|
| 2 | [be] [adv] a [noun sg] | 19720 |
|
| 3 | [be] [adv] [art] period | 42 |
|
| 4 | [be] [adv] [art] period | 42 |
|
| 5 | [be] [adv] a period | 27 |
|
| 6 | [be] [adv] a period | 27 |
|
