| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at least 50 [unc] | 22 |
|
| 2 | at least 50 [unc] | 22 |
|
| 3 | [prep] least 50 per | 22 |
|
| 4 | [prep] least 50 [unc] | 22 |
|
| 5 | [prep] least 50 per | 22 |
|
| 6 | [prep] least 50 [no cls] | 22 |
|
