| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | efficient than [art] | 30 |
|
| 2 | efficient than [art] | 30 |
|
| 3 | efficient than the | 25 |
|
| 4 | efficient than the | 25 |
|
| 5 | efficient than a | 5 |
|
