| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [adj] time | 380 |
|
| 2 | at a [adj] time | 309 |
|
| 3 | at a critical [noun] | 47 |
|
| 4 | at a critical [noun sg] | 47 |
|
| 5 | at [art] critical time | 18 |
|
| 6 | at [art] critical time | 18 |
|
| 7 | [prep] a critical time | 12 |
|
| 8 | [prep] a critical time | 12 |
|
| 9 | at a critical time | 11 |
|
| 10 | at a critical time | 11 |
|
| 11 | at a critical time | 11 |
|
| 12 | at a critical time | 11 |
|
