| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun] of lectures on | 18 |
|
| 2 | a [noun] [prep] lectures on | 18 |
|
| 3 | a [n mass] [prep] lectures on | 13 |
|
| 4 | a series [prep] lectures on | 13 |
|
| 5 | a series [prep] lectures on | 13 |
|
| 6 | a [noun sg] [prep] lectures on | 5 |
|
