Cassie,
Mine (with enalapril) wasn't constant either, usually in the evening. Horrible when the timing was truly dreadful. One attack was at the Metropolitan Opera, another at a Broadway show...at those prices people don't wan't someone hacking away behind them. I even tried so hard to avoid the cough that tears would stream down my face until I gave in!
Sometimes it got most annoying just when I was trying to fall asleep.
It never stopped til I discontinued the drug 6 months later.
I too was eating coughdrops to the point of MENTHOL poisoning!
I even had a several week bout after stopping then restarting an ARB, Cozaar!