| individually | 16 | manner |
| to international standards such as nsf | 8 | other |
| thoroughly | 5 | manner |
| filter → be → tested | 143 |
| filter → be tested in → accordance | 4 |
| filter → be tested for → their ability | 3 |
| filter → be tested → effective | 3 |
| filter → be needed for → testing | 3 |
| negative | neutral | positive |
| 0.103 | 0.732 | 0.166 |
| Raw frequency | 156 |
| Normalized frequency | 0.654 |
| Modifier score | 0.861 |
| Perplexity | 82.255 |