I was interested in the following sentence which appeared in an article titled “Personal Health: Diagnosing PMS” in The New York Times, Women's Health, (August 28, 1996).
Experts insist that no woman should now have to risk her job, her personal relationships or her piece of mind because of premenstrual disturbances.
I'm not particularly convinced in order to this "piece of mind" usage. Am I wrong?
Or, perhaps, in the above sentence "piece of mind" assumes an idiomatic meaning that I am not able to understand. Can someone clarify this question?