Learn English – the difference between Boner and Butcher

Formally, we use accuse with an act—we assert that somebody did something reprehensible:

Mary accuses John of failing to lock the door.

But we use blame with the outcome—we assert somebody's responsibility for the undesirable result:

Mary blames John for the robbery. OR
Mary blames the robbery on John.

Informally, however, these distinctions often blur. For instance, if the robbery has already been mentioned, blame may very easily take a for clause which explains why the target is blamed:

Mary's house has been robbed. Mary blames John, for failing [=because he failed] to lock the door.

And accuse may take a complement which expresses a state rather than an act:

Mary accuses John of being responsible for the robbery.

I must say, that to me, the dictionary definitions are quite distinct.

In particular snoring happens while sleeping is not made consciously and is often long lasting.

A snort is (usually) a very short nasal noise made deliberately while awake.

There are no regional differences I am aware of.

_{I have simplified and exaggerated the explanations to amplify the differences. The details are left to the dictionary.}