Literal question
In the past 7 days (since last ____) how many hours has [NAME] spent preparing meals, cleaning the house, doing the laundry or shopping for food? Total hrs. for the week.
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Ask how many hours in the past 7 days were spent preparing meals, cleaning the house, washing clothes, or shopping for food. If the respondent cannot give you an answer, you should help her calculate the answer by asking how much time was spent doing these activities in the past day, and then asking for the number of days (in the past 7 days) that the activity was done.