| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for about [adj] years | 242 |
|
| 2 | for about four [noun] | 55 |
|
| 3 | for about four [noun pl] | 53 |
|
| 4 | for [adv] four years | 50 |
|
| 5 | [prep] about four years | 26 |
|
| 6 | [prep] about four years | 26 |
|
| 7 | for about four years | 19 |
|
| 8 | for about four year | 19 |
|
