| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] [noun] [unc] time | 84 |
|
| 2 | [prep] a [adj] [noun pl] [unc] time | 77 |
|
| 3 | [prep] a [adj] years [unc] [noun] | 34 |
|
| 4 | [prep] a [adj] year [unc] time | 26 |
|
| 5 | [prep] [art] [adj] years [unc] time | 24 |
|
| 6 | [prep] a [adj] years [unc] time | 24 |
|
