How often do you buy groceries?
What types of things do you consider “essential”?
Do you make a list when you go shopping, or just have an idea of what you need?
Do you do one big trip all at once, or do you pick up just enough to make what you’re eating that night/the next day?
Shopping is a mix of buying stuff that is pre-planned, and impulse purchases. That depends on a number of factors. If I went to the supermarket to buy e.g. peppers, but the ones they have don’t look good, I can spontaneously change the meal and buy something else for which I can buy good products. Same at the meat frontier, I can easily switch plans if shopping reality dictates differently.