collocation | frequency |
---|---|
polio eradication | 9 |
polio vaccine | 5 |
eradication program | 4 |
polio virus | 3 |
united states | 3 |
eradicate polio | 3 |
million children | 3 |
percent reduction | 3 |
big idea | 2 |
iron lung | 2 |
scientific miracle | 2 |
public health | 2 |
smallpox eradication | 2 |
multiple times | 2 |
northern india | 2 |
stopped polio | 2 |
uttar pradesh | 2 |
great buy | 2 |
finishing polio | 2 |
collocation | frequency |
---|---|
polio eradication program | 4 |