| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj -er] and [adv] efficient | 34 |
|
| 2 | [adj -er] and [adv] efficient | 34 |
|
| 3 | [adj -er] and more efficient | 30 |
|
| 4 | [adj -er] and more efficient | 30 |
|
| 5 | cheaper and [adv] efficient | 5 |
|
