| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] and [adv] efficient [noun] | 9 |
|
| 2 | a [adj] and more efficient [noun] | 9 |
|
| 3 | a [adj] and [adv] efficient [noun] | 9 |
|
| 4 | a [adj] and [adv] efficient [noun sg] | 8 |
|
| 5 | a [adj -er] and [adv] efficient [noun] | 8 |
|
