| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv prt] at an [adj] [noun] | 48 |
|
| 2 | [adv] at an [adj] stage | 35 |
|
| 3 | [adv prt] at [art] [adj] stage | 26 |
|
| 4 | [adv prt] at [art] [adj] stage | 26 |
|
| 5 | [adv prt] at a [adj] stage | 17 |
|
| 6 | [adv prt] [prep] an [adj] stage | 14 |
|
| 7 | [adv prt] [prep] an [adj] stage | 14 |
|
| 8 | [adv prt] at an [adj] stage | 12 |
|
