| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | on average [adj] [unc] | 18 |
|
| 2 | on [noun] [adj] per | 17 |
|
| 3 | on [noun sg] [adj] per | 17 |
|
| 4 | [prep] average [adj] per | 16 |
|
| 5 | on average [adj] per | 16 |
|
