Come on brain!
One technique for dealing with the problem is to walk away whistling, then circle back undercover and pounce. Take the brain off guard. I've been trying that. And it hasn't worked....
...Hey I've got it! I'll tell you what I did. I decided to Google "historical fiction" and hope that I'd find a text containing my word. And before I'd done more than type an "h" and an "i" the brain had surrendered and handed over the goods. It quails before the power of Google. It knew the game was up.