Great fear depends on the person, animal, or any living things with emotion and has fear on something. We have many fears and everyone can categorize his/its fear and could considered one as great fear. There will be no definite answer for this it depends on individual.
inspired the National Assembly to abolish feudal rights.
in case your talking about the great fear in France in 1789 !
the great fear is when the french people got sick of the monarchy
and dicided to over throw the king