| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [adv] [prep] [det] period | 13 |
|
| 2 | it be [adv] [prep] [adj] period | 13 |
|
| 3 | it be [adv] [prep] this period | 13 |
|
| 4 | it be [adv] [prep] [adj] period | 13 |
|
| 5 | it be [adv] [prep] this period | 13 |
|
| 6 | it was [adv] [prep] [adj] period | 12 |
|
| 7 | it be also [prep] [adj] period | 9 |
|
| 8 | it be also [prep] [adj] period | 9 |
|
| 9 | it be [adv] during [adj] period | 9 |
|
