| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [been] used for [noun] | 14 |
|
| 2 | [been] used for many [noun] | 13 |
|
| 3 | has [been] for many [noun] | 12 |
|
| 4 | has [been] used for many | 8 |
|
