| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] any length of time [pers pn] | 6 |
|
| 2 | [prep] [det] length of time [pers pn] | 6 |
|
| 3 | [prep] [adj] length of time [pers pn] | 6 |
|
| 4 | [prep] any length of time [pers pn] | 6 |
|
| 5 | for [adj] length of time [pers pn] | 6 |
|
