A:
To be honest they both sound unnatural to me and the grammar is a bit mixed up in the first one you wrote 😅
There are a few other ways you could say it;
-Thank you for your corrections.
-I am always thankful for your corrections.
-Thank you for (always) correcting my mistakes.
Or if you want to be a bit casual with a friend you could say; thanks for the help! 😄
Thank you always for your corrections (as your dictionary said) is correct too, but it is a bit unnatural to say and sounds a bit funny too 😅 I hope that this helped 😅