| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] fifteen years [conj] [pers pn] | 8 |
|
| 2 | [prep] fifteen years [conj] [pers pn] | 8 |
|
| 3 | for fifteen years [conj] [pers pn] | 5 |
|
| 4 | for fifteen years [conj] [pers pn] | 5 |
|
| 5 | fifteen years [adj] [conj] [pers pn] | 7 |
|
| 6 | fifteen years [adj -er] [conj] [pers pn] | 6 |
|
| 7 | fifteen years [conj] [pers pn] [verb] | 15 |
|
| 8 | fifteen years [conj] [pers pn] [vb base] | 8 |
|
| 9 | fifteen years [conj] [pers pn] have | 8 |
|
| 10 | fifteen years [conj] [pers pn] [vb past] | 6 |
|
