Its a fucking stupid and manipulative question for the employer to ask. No employer should give a fuck if somebody took a couple years to travel, take care of family, or just couldn’t find a job.

What they are really asking "Are any of the time gaps in your job history, a job that you got fired from with cause? "

Instead of being little shits about it just ask the actual question straight out. The shock value of asking a real non-bullshit questions in an interview has paid off many times for me when hiring.