| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [v-ing] several years | 8 |
|
| 2 | [noun sg] [v-ing] several years | 6 |
|
| 3 | [v-ing] [prep] several years | 19 |
|
| 4 | [v-ing] [prep] several years | 19 |
|
| 5 | [v-ing] for several years | 17 |
|
| 6 | [v-ing] for several years | 17 |
|
| 7 | [v-ing] [adv prt] several years | 5 |
|
| 8 | [v-ing] [adv] several years | 5 |
|
| 9 | [v-ing] several years [prep] | 8 |
|
| 10 | [v-ing] several years [prep] | 8 |
|
| 11 | [v-ing] several years of | 5 |
|
| 12 | [v-ing] several years of | 5 |
|
