for a wonder
Contrary to the expected outcome; surprisingly. I just started exercising again this year as part of my New Year's resolution, and, for a wonder, I'm actually really enjoying it! For a wonder, my son didn't argue when I asked him to clean his room.
for a wonder
Surprisingly, strange to say, as in For a wonder he didn't argue with the waiter about the bill. [Late 1700s]
for a wonder
As a cause for surprise; surprisingly.