| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | about [adj] year | 1292 |
|
| 2 | about [num] year | 1286 |
|
| 3 | about ten [noun] | 591 |
|
| 4 | [adv] ten year | 458 |
|
| 5 | about ten year | 127 |
|
