Sometimes I encounter an idiom (or 成语) and think to myself "oh, I like this 成语, maybe I should learn it". However, I'll often find out later that nobody actually uses that particular 成语, and I've wasted my time learning it.
For example, I just stumbled upon 完事大吉 (wán shì dà jí) which means something like "and there you have it" (literally "everything's finished"). It sounds like a useful 成语 that I might use, and only uses characters I've encountered before. But I have no real idea if it's worthwhile learning or not.
Question: Is there a reliable way to check if a 成语 is widely used?