The 7 pairs where both forms appeared in the top-10. These are the rows where the ranker had to choose between two valid alternatives.
| Query | Swift rank | Obj-C rank |
|---|---|---|
| URLRequest | 1 | 3 |
| URLComponents | 1 | 2 |
| Bundle | 1 | 2 |
| Measurement | 1 | 8 |
| DateComponents | 1 | 4 |
| DateInterval | 1 | 6 |
| Decimal | 1 | 7 |
In every case Swift is at rank 1, Obj-C at rank 2 or later. The minimum Obj-C rank is 2 (URLComponents, Bundle); the maximum is 8 (Measurement). The gap between the two is consistent across the corpus.
For the other 23 pairs the NS-prefixed form either does not exist as a separate documented page or ranks below position 10 (not measured here; the harness limits to top-10).