| Share | Phrase |
|---|
| 11.18% | prefer chlorine [perform operation] |
| 9.57% | chlorine evolution |
| 8.10% | chlorine content |
| 7.70% | chlorine wppm |
| 7.20% | add chlorine [perform operation] |
| 6.49% | chlorine [is] radical |
| 5.82% | residual [amount] chlorine |
| 5.74% | chloride chlorine |
| 4.84% | pass chlorine [perform operation] |
| 4.73% | contain chlorine [perform operation] |
| 4.45% | chlorine contain |
| 4.27% | introduce chlorine [perform operation] |
| 3.65% | mass chlorine |
| 3.22% | free of chlorine |
| 3.17% | chlorine gas |
| 2.67% | present [chronology] chlorine |
| 2.26% | gaseous [state] chlorine |
| 1.71% | available [effectiveness] chlorine |
| 1.68% | chlorine modal may |
| 1.48% | include chlorine [perform operation] |