| to protect themselves | 4 | purpose |
| to move in shallow water | 2 | purpose |
| swimmer → use → mask | 10 |
| swimmer → wear → face masks | 4 |
| swimmer → wear → special protective masks | 3 |
| negative | neutral | positive |
| 0.144 | 0.776 | 0.079 |
| Raw frequency | 17 |
| Normalized frequency | 0.427 |
| Modifier score | 0.500 |
| Perplexity | 117.947 |