| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv prt] at a [adj] stage | 12 |
|
| 2 | [adv prt] at an [adj] stage | 11 |
|
| 3 | [adv prt] at a early stage | 11 |
|
| 4 | out at a [adj] stage | 6 |
|
