| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] a time | 1840 |
|
| 2 | [noun pl] [prep] a time | 570 |
|
| 3 | years [prep] a [noun] | 507 |
|
| 4 | years [prep] a [noun sg] | 477 |
|
| 5 | years [prep] [art] time | 45 |
|
| 6 | years [prep] [art] time | 45 |
|
| 7 | year [prep] a time | 29 |
|
| 8 | years [prep] a time | 17 |
|
| 9 | years [prep] a time | 17 |
|
