| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been used for [det] [noun sg] | 12 |
|
| 2 | been used [prep] this [noun sg] | 12 |
|
| 3 | been used in [det] [noun sg] | 9 |
|
| 4 | been used [prep] some [noun sg] | 9 |
|
| 5 | been used [prep] [det] purpose | 5 |
|
| 6 | been used [prep] [det] time | 5 |
|
