| unknown to | 15.54 | Litigation is not unknown to you. | ||
| unknown in | 10.93 | AIDS is not unknown in Poland. | ||
| unknown outside | 2.30 | She is virtually unknown outside Switzerland. | ||
| unknown for | 1.32 | His whereabouts had been unknown for months. | ||
| unknown until | 1.25 | The group was unknown until a few months ago. | ||
| unknown about | 0.99 | Much remains unknown about his early life. | ||
| unknown at | 0.66 | Its prospects are unknown at this time. | ||
| unknown among | 0.53 | The prion disease is unknown among cattle in America. | ||
| unknown before | 0.53 | He was virtually unknown before running for office. | ||
| unknown as | 0.39 | Gibson was virtually unknown as an actor. | ||
| unknown because_of | 0.39 | The results in one district were still unknown because of heavy snow in the area. | ||
| unknown of | 0.39 | Her music was previously unknown outside of Asia. | ||
| unknown on | 0.39 | Their whereabouts remained unknown on Monday. | ||
| unknown after | 0.26 | The identity of the hijacker and his motives were still unknown after the incident ended peacefully. | ||
| unknown during | 0.26 | The licensing system was unknown during Dutch colonialism. |