| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | period of [adj] than [art] | 8 |
|
| 2 | period of [det] than [art] | 7 |
|
| 3 | period of [adj] than a | 7 |
|
| 4 | period of [adj] than [art] | 6 |
|
