Question
What's the difference between instabil
and unstabil
?
Elaboration
I always use instabil
, but hear other people also use unstabil
.
I assumed unstabil
was wrong, but Duden has an entry for it: http://www.duden.de/rechtschreibung/unstabil
Duden has also an entry for instabil
: http://www.duden.de/rechtschreibung/instabil
Some Internet sources say that unstabil
is used for "unstable constructions / buildings" but I feel like instabil
goes perfectly well in that context, too.
Can anybody shine a light on the differences in connotation if there are any?
Statistics
If you enter unstabil
into Google, Google's "Did you mean" feature suggests instabil
. https://www.google.ch/?#q=unstabil
Also, Google Trends says that instabil
is used way more often: http://www.google.com/trends/explore#q=instabil%2C%20unstabil&cmpt=q