| Answer | Crossword Clue |
|---|---|
| OCTAN | Occurring every eighth day |
| OCTAN | Occurring every eighth day. |
| OCTAN | Occurring every 8th day. |
| TERTIAN | Occurring every other day. |
| QUARTAN | Occurring every fourth day. |
| TERTIAN | Occurring every third day. |
| OCTAN | Every eighth day |
| OCTAN | Recurring every eighth day. |
