[General] Is there any difference between free sb. from sth and free sb. of sth?

[rorysnow]

He has been freed from all trouble and responsibility.
I'd like to free myself of some of the responsibilities of this job.


I got the first sentence from the internet and the second one from online Cambridge dictionary.
I believe there is a difference between "free sb. from sth." and "free sb. of sth." because I don't think the they are interchangable in the following cases:
It took hours to free the victims from the collapsed building.
She freed herself of worry.

but I can't describe the difference
Please help me~

 

[Roman55]

I am not a teacher.

"It took hours to free the victims from the collapsed building." By analogy with release from.
"She freed herself of worry." By analogy with rid of.