| slightly | 7 | degree |
| preferably | 7 | degree |
| compared with a perfectly smooth surface | 7 | other |
| surface → be → roughened | 99 |
| surface → be roughened with → mechanically | 3 |
| surface → be roughened for → example | 3 |
| surface → be → roughed | 3 |
| surface → be roughened in → addition | 3 |
| negative | neutral | positive |
| 0.083 | 0.791 | 0.126 |
| Raw frequency | 111 |
| Normalized frequency | 0.534 |
| Modifier score | 0.744 |
| Perplexity | 27.243 |