1/2 as common. https://astrobites.org/2022/04/16/template-post-9/#:~:text=Type%20II%20supernovae%20are%20about%202.4%20times,would%20be%20highly%20beneficial%20

1/2 as common. https://astrobites.org/2022/04/16/template-post-9/#:~:text=Type%20II%20supernovae%20are%20about%202.4%20times,would%20be%20highly%20beneficial%20(see%20Figure%202). https://astrobites.org/2022/04/16/template-post-9/#:~:text=T...