Winningtemp's standard is once a week to be able to measure temperature "in real-time", but it's up to your organisation to decide how often you get surveys from Winningtemp. You will also receive recommendations on how many questions per mailing you should have. The recommendations consider how many active questions you have and what the mailing frequency is.
You get one and a half a week to answer a survey until it's inactivated if you get surveys every week.
As a system administrator, you can tweak the survey interval if you go to Admin view - Surveys > Standard survey > General settings.
2021-12-20 - Added read more section and added new screenshot