| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] than [art] [noun sg] system | 6 |
|
| 2 | [adv] than [art] [noun sg] system | 6 |
|
| 3 | than [art] [adj] [noun sg] system | 8 |
|
| 4 | than [art] [adj] [noun sg] system | 8 |
|
