In one experiment, they placed mice in a cage with two rooms, and trained them to expect occasional doses of cocaine in one of the rooms. (sciencedaily.com)
I also relax my food standards for my kids, who have gluten intolerances, but can handle small occasional doses of non gluten - containing grains, dairy, and legumes. (paleononpaleo.com)
It probably shouldn't have struck me as odd that a people whose only contact with the America of little brown churches is some faintly remembered trip to a grandmother's farm or an occasional dose of television's «Little House on the Prairie» should mourn the passing of an age and lifestyle now deemed better than this one. (religion-online.org)