| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| why was morphine created | 1.3 | 0.6 | 9012 | 9 | 24 |
| why | 0.03 | 0.5 | 2210 | 11 | 3 |
| was | 1.67 | 0.5 | 1472 | 36 | 3 |
| morphine | 1.26 | 0.5 | 3106 | 7 | 8 |
| created | 0.41 | 0.8 | 1785 | 39 | 7 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| why was morphine created | 1.48 | 0.2 | 3163 | 4 |
| when was morphine created | 1.36 | 0.3 | 6969 | 81 |
| when was morphine developed | 1.3 | 0.1 | 1356 | 16 |
| what year was morphine invented | 1.53 | 0.3 | 1870 | 4 |
| brief history of morphine | 0.67 | 0.6 | 4532 | 78 |
| what is the origin of morphine | 1.92 | 0.4 | 6899 | 11 |
| when was morphine first used | 1.62 | 0.8 | 5432 | 46 |
| when was morphine introduced | 1.2 | 0.5 | 9287 | 47 |
| when was morphine made | 1.01 | 0.4 | 8978 | 2 |
| how was morphine discovered | 0.56 | 0.5 | 8732 | 50 |
| use of the morphine in history | 0.16 | 0.9 | 3667 | 25 |
| history of morphine drug | 0.63 | 0.9 | 8449 | 36 |
| when did morphine start being used | 2 | 1 | 6867 | 80 |
| what is morphine derived from | 1.93 | 0.7 | 6237 | 58 |
