| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | by a [noun] | 18470 |
|
| 2 | [prep] a year | 1994 |
|
| 3 | [prep] a year | 1994 |
|
| 4 | by [art] year | 559 |
|
| 5 | by [art] year | 559 |
|
| 6 | by a year | 26 |
|
| 7 | by a year | 26 |
|
