| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [adv] [num] years | 568 |
|
| 2 | at least [adj] years | 544 |
|
| 3 | at [adv] two years | 120 |
|
| 4 | at [adv] two years | 120 |
|
| 5 | at [adv] three years | 68 |
|
| 6 | at [adv] three years | 68 |
|
| 7 | at [adv] five years | 65 |
|
| 8 | at [adv] five years | 65 |
|
| 9 | at [adv] ten years | 32 |
|
| 10 | at [adv] ten years | 32 |
|
| 11 | at [adv] four years | 18 |
|
| 12 | at [adv] four years | 18 |
|
| 13 | at [adv] twenty years | 17 |
|
| 14 | at [adv] twenty years | 17 |
|
| 15 | at [adv] 30 years | 16 |
|
| 16 | at [adv] 30 years | 16 |
|
| 17 | at [adv] 10 years | 15 |
|
| 18 | at [adv] 10 years | 15 |
|
| 19 | at [adv] 20 years | 13 |
|
| 20 | at [adv] 20 years | 13 |
|
| 21 | at [adv] fifteen years | 12 |
|
| 22 | at [adv] fifteen years | 12 |
|
| 23 | at [adv] 25 years | 11 |
|
| 24 | at [adv] 25 years | 11 |
|
| 25 | at around [adj] years | 11 |
|
| 26 | at [adv] six years | 10 |
|
| 27 | at about [adj] years | 10 |
|
| 28 | at [adv] six years | 10 |
|
| 29 | at [adv] 5 years | 9 |
|
| 30 | at [adv] 5 years | 9 |
|
