| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to [art] period [prep] | 93 |
|
| 2 | [art] [adj -er] period [prep] | 88 |
|
| 3 | to [art] [adj -er] [prep] | 15 |
|
| 4 | to [art] [adj -er] period | 10 |
|
