It shall have TWO evolved adverbs:
The difference between them is just passive (frustratedly) and active (frustratingly) voices.
2013-10-09 13:51:58 補充：
This kind of word that is related to how a person feels can always have passive and active situation, therefore, its adverb can have both types, for example:
Interestingly vs interestedly
concernedly vs concerningly