| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] at that period | 19 |
|
| 2 | [noun sg] at that period | 16 |
|
| 3 | [verb] at that period | 5 |
|
| 4 | at that period [prep] | 7 |
|
| 5 | at that period [prep] | 7 |
|
| 6 | at that period was | 5 |
|
| 7 | at that period be | 5 |
|
| 8 | at that period [be] | 5 |
|
| 9 | at that period [was/were] | 5 |
|
