| sensitive subject | 8.23 | But it is a sensitive subject. | ||
| same subject | 6.12 | The same subjects had dazzled him. | ||
| touchy subject | 6.12 | Kind of a touchy subject. | ||
| favorite subject | 5.73 | My favorite subject is math. | ||
| taboo subject | 5.20 | A taboo subject. | ||
| human subject | 4.21 | Drug tests generally have been limited to human subjects. | ||
| controversial subject | 4.15 | Abortion is a controversial subject. | ||
| new subject | 3.88 | New subject. | ||
| different subject | 3.49 | Essays on different subjects. | ||
| particular subject | 3.29 | My own particular academic subject is geography. | ||
| academic subject | 2.76 | Those are not academic subjects. | ||
| main subject | 2.57 | Balkans main subject for US-Russia talks. | ||
| specific subject | 2.57 | It is a unique meeting on a specific subject. | ||
| british subject | 2.50 | Roughly half of them are British subjects. | ||
| difficult subject | 2.50 | This is a difficult subject. | ||
| only subject | 2.17 | His only subjects are his fans. | ||
| serious subject | 2.17 | Viruses are a serious subject. | ||
| normal subject | 2.11 | Giant rectal contractions were never seen in normal subjects. | ||
| delicate subject | 2.04 | They were tiptoeing around the delicate subject of money. | ||
| popular subject | 2.04 | The humanities have not been popular subjects. |